Used Knopp Extraction System Filter System Extraction for sale (42,080)

Condition: good (used), planing width: 510 mm, working width: 510 mm, working height: 200 mm, Thickness planer REX, table width 510mm, max. planing height 200mm, two cutterblocks. Isdpfx Ajy Sxyajg Aoba

Condition: new, With air flow rates of up to 22,000 m³/h, the stationary compact filter systems of the ECO JET series offer a wide range of applications. They are the ideal extraction solution for machines in various manufacturing sectors and industries, including larger processing machines. Eligible for BAFA funding according to Module 4. ECO JET series systems are equipped with fans arranged on the clean air side, which draw the dust- and chip-laden air towards the filter unit. In the most powerful DUO models, two fans are connected in parallel. A flange at the filter unit inlet enables the connection of custom duct diameters. The aerodynamically optimized airflow in the separation chamber allows coarse particles to be separated directly, without reaching the filter bags. Residual dust collected by the filters is automatically cleaned by the AL-KO OPTI JET® filter cleaning system, with the separated material discharged into mobile collection containers located beneath the filter. Applications: - Extraction from production machines, machining centers, and ductwork systems with multiple suction points - Direct extraction for continuous operation - In sectors such as wood processing, joineries, carpentry workshops, furniture manufacturing, plastics manufacturing and processing, paper production, orthopedic industry, and many more Advantages: - Wide selection of standard extraction systems with numerous customer-specific customization and options - Consistently high suction performance thanks to integrated pre-separator and AL-KO OPTI JET filter cleaning system - Heating cost savings, as 100% recirculation operation is possible in many cases - Small footprint due to compact design - Suitable for indoor and outdoor installation - Available in ATEX-compliant versions - Extensive range of accessories and numerous options for individual device configuration - Eligible for BAFA funding according to Module 4 Isdjwwtuispfx Ag Aoba

Condition: new, Thanks to their modular design, the PROFI JET® series system filter units enable the bespoke planning and construction of extraction solutions for virtually any required air volume and practically every conceivable application. The proven system also impresses with outstanding noise protection due to its insulated wall panels and, when installed outdoors, minimizes heat loss. Eligible for BAFA funding under Module 4. Operation: The custom-designed extraction systems of the PROFI JET series are built on a robust steel frame. The frame is fully clad with insulated, double-walled, powder-coated steel sheet panels to ensure that all components—including fan, filter cleaning, and discharge elements—are protected from dirt and weather within the closed system enclosure. The clean-air side fans are installed at the top of the unit and draw in dust- and chip-laden air into the filter section. A generously proportioned pre-separation chamber ensures effective separation of coarse particles and chips. The subsequent filter bags or cartridges remove any remaining fine dust. The cleaned exhaust air is routed through a sound-insulated return air chamber either back into the building or discharged outside. Applications: - Extraction at multiple processing machines, workstations, or entire production areas - Spatial ventilation and extraction for enclosures and work cabins - Suitable for virtually all types of dust and chips - Also for dusts and applications with ATEX classification - Extraction especially in the wood, plastics, metal, welding, cutting, and recycling industries—as well as many others Advantages: - Custom, precise planning and implementation of your extraction system - Cost-effective and quick delivery due to modular design with standard components - Quiet and energy-saving operation thanks to insulated panels - Consistently high extraction performance due to integrated pre-separation chamber and AL-KO OPTI JET® filter cleaning system - Heating cost savings, as 100% recirculated air operation is possible in many cases - Minimal space requirements due to compact construction - Suitable for indoor and outdoor installation - Professional appearance thanks to powder-coated panels - Available in ATEX-compliant versions Ibjdpfowwryqox Ag Aoa - Comprehensive accessories and numerous options for individualized system configuration - Eligible for BAFA funding under Module 4

Condition: used, Büchel SH-2000-PEV Electrostatic Air Filter Extraction System Extraction capacity: 2000 m³/h Top performance and easy maintenance thanks to the filter inserts and adjustable exhaust air flow via the pod. Used, as shown in the pictures. From warehouse stock (may have storage marks). Ibsdpfx Agozk H I Hj Asa Please refer to the pictures for further technical information. Scope of delivery as shown in the pictures. The invoice will be enclosed with the shipment.

Condition: new, Year of construction: 2025, functionality: fully functional, Our powerful "MM 2010" sandblasting cabinet uses a pressure blasting process and, thanks to its innovative media recirculation system, is suitable for all types of blasting media. Thanks to the bucket elevator permanently connected to the cabinet, even the heaviest types of blasting media, such as stainless steel, cast steel, and other metallic media, can be used without any problems. Unlike competing systems, the blasting media is not sucked back into the cabinet, but rather transported to the adjacent bucket elevator via a flat conveyor system. The bucket elevator conveys the material upwards and throws it into the cyclone separator, where the blasting media is cleaned and returned to the blasting process. Our specially developed media recirculation recycling system ensures continuous media flow, regardless of the extraction system's suction power. Thanks to the media recirculation system and the innovative fan technology, the blasting cabinet has very low energy requirements (0.75 kW fan motor). Since the blasting material is not sucked back in, no oversized extraction system with high power consumption is required (as with many competitive systems). To achieve maximum blasting performance, the "MM 2010" pressure blasting cabinet is equipped with a 60-liter pressure blasting tank. This is equipped with a pressure regulator for continuously adjusting the blasting pressure from 0.1 to 12 bar. For safe operation, a water separator is permanently mounted on the blasting tank, protecting the blasting media from moisture. The pressure blasting nozzle is made of highly wear-resistant boron carbide and allows a service life of up to 1,000 hours, depending on the blasting media used. The blasting chamber is equipped with a wear-resistant rubber lining, which increases the service life of the blasting media and protects the blasting cabinet from wear. An air blow gun is installed for cleaning the blasted workpieces and blowing off the cabinet walls. Iedswc Nrnopfx Ag Aeba The permanently installed cartridge filter extraction system ensures optimal visibility in the blast chamber and maximum abrasive service life. The extraction system features continuous cleaning of the filter cartridges using compressed air blasts. This ensures a long service life of the filter media and consistently consistent extraction performance. The blast chamber is loaded via an angled front flap that swings completely upwards. This allows the blast cabinet to be loaded using a forklift or crane. The sturdy work grate can support a maximum load of 500 kg. To ensure optimal visibility in the blast chamber, two powerful and energy-saving LED lights are mounted on the cabin roof. Their roof-mounted design protects them from dust and wear. The system is operated via a modern touchscreen display. To ensure safe operation of the blast cabinet, the blast cabinet is equipped with a door safety switch. The installed viewing windows are made of toughened safety glass and are provided with a wear-resistant film.

Condition: excellent (used), Year of construction: 2022, Technical data: - Total filter capacity approx. 150 l/min Isdpfx Agozk Ek Tj Aeba - Filter fineness approx. 3 μm nominal - Dimensions (W x D x H) approx. 1400 x 1300 x 1100 mm - Tank capacity approx. 800 l Equipment: - 2 filter groups, individually backwashable, each with 1 TCF filter tower - 1 filter pump - 1 pneumatic unit - 1 manual sludge removal system with sludge bag - Internal system piping - Color RAL 7035 - 1 control cabinet, wired according to VDE standards, PLC control, operation and parameterization via touch panel 1 unit of machine supply pump for supplying the machine with filtered coolant as a submersible centrifugal pump Technical data: - Flow rate: approx. 70 l/min - Delivery pressure: approx. 5 bar - Drive: 400V, 50Hz 1 unit of cooling pump as a submersible centrifugal pump Technical data: - Flow rate: approx. 80-120 l/min - Delivery pressure: approx. 1.5 bar - Drive: 400V, 50Hz, IE3

Year of construction: 2005, condition: used, Extraction system for removing dust from the ambient air. The motor drives a fan impeller, creating negative pressure. The air is sucked into the machine via the intake manifold and reaches the filter elements. The treated air is then blown out again. Additional title: Workshop dust extraction Nominal flow rate: 1400 m³/h minimum flow rate: 1,108 m³/h Power: 2.2 kW Current: 5 A Voltage: 400 V Frequency: 50 Hz Base construction: on a mobile frame Features: 140 mm intake manifold; air filter (category C el. lt.); asynchronous motor (manufacturer EMGR) Ibjdpozgczhsfx Ag Asa

Condition: used, Year of construction: 2018, power: 7.5 kW (10.20 HP), input voltage: 400 V, input current: 13 A, input frequency: 50 Hz, type of input current: three-phase, volume flow: 10,000 m³/h, total height: 2,150 mm, total length: 2,400 mm, total width: 1,800 mm, overall weight: 1,250 kg, We are offering this used KEMPER 811000100FU extraction system, manufactured in 2018. Type: 811000100FU Airflow rate: 10000 m³/h Voltage: 400 V Rated current: 13.8 A Motor power: 7.5 kW Current: 3 ~ Frequency: 50 Hz Duty cycle: 100% Protection class IP: Control voltage: 24 V Minimum compressed air supply: 5 bar Maximum compressed air supply: 6 bar Maximum static pressure: 2500 Pa Weight: 1250 kg Ibjdszk Dukjpfx Ag Aja If you have any questions or require further information, please feel free to send us a message or call us.

Condition: new, functionality: fully functional, total height: 1,640 mm, total length: 1,400 mm, total width: 1,100 mm, overall weight: 267 kg, Equipment: CE marking, documentation/manual, type plate available, ISI-Flow Desk – 1000VH – 960 m³/h – 400 V Extraction table, welding and grinding table. Extraction table with a 1.1 kW fan, filter cartridge, and wooden slats, as well as a rear wall with extraction and a ceiling and side walls without insulation. The extraction table with automatic compressed air cleaning filter and integrated fan for extracting non-explosive, dry dust and gases. TECHNICAL DESCRIPTION: Extraction capacity: 960 m³/h Dust class: M Working area W/D in mm: W 892 / D 765 Working height in mm: H 690 - 924 Table load: 150 kg/m (wood, with evenly distributed load) Work surface: Wooden slats (optional steel, stainless steel, or plastic slats) Overall dimensions W/D/H in mm: W 1400* / D 1100 / H 1640 (optional L = 1500/2000 mm available) Compressed air connection: Yes, min. 5.5 - max. 6.0 bar (for filter cleaning) Fan power: 1.1 kW Operating voltage: 3 x 400 V, 50 Hz, 2-pole Noise level*: 65 db(A) without cleaning / 85 db(A) without cleaning Pipe connection: D = 250 mm Color: RAL 7042/RAL 7011 Weight: 267 kg * With fan and nozzle Isdpfxozdty Nj Ag Asba Application: The extraction table with a fan is used to separate dust and welding fumes from the process air. Suitable for work where vapors and dust are generated, such as welding, grinding, etc. Your advantages of the ISI-Flow Desk series: - 12 device variants available - Filtration with compressed air-cleaned filter cartridge according to dust class M - Automatic filter cleaning by pressing a button on the front - Differential pressure gauge for easy monitoring of the cleaning requirement - Integrated, energy-efficient fan 3x400V, 50 Hz, 2-pole; closed fan blades, backward-curved, self-cleaning impellers; ISO 14694 (BV3 G 6.3) balanced - Rear wall, side walls, and ceiling ensure effective extraction and holistic air flow - Height-adjustable work table - Wide range of mounting and connection accessories - Quality Made in Europe For safe, effective air flow from extraction to exhaust. The ISI Air extraction table must not be used in conjunction with ATEX zones. The images may contain accessories.

Condition: new, functionality: fully functional, total height: 938 mm, total length: 2,000 mm, total width: 1,100 mm, overall weight: 100 kg, Equipment: CE marking, documentation/manual, type plate available, ISI-Flow Desk – 2000E – 2880 m³/h – 230 V Extraction table, welding and grinding table with electric height adjustment The ISI Flow Desk 2000 E extraction table is a height-adjustable workbench for extracting non-explosive, dry dust and gases. TECHNICAL DESCRIPTION: Possible extraction capacity: 2880 m³/h Work surface W/D in mm: W 1990 / D 824 Work height in mm: H 638-938 mm Table load: 200 kg/m (wood, with evenly distributed load) Work surface: Wood slats (optional steel, stainless steel, or plastic slats) Overall dimensions W/D/H in mm: W 2000 / D 1100 / H 938 (optional L = 1000/1500 mm available) Fan power: without fan Operating voltage: 1 x 230 V, 50 Hz Pipe connection: D = 251 mm Color: RAL 7042 / RAL 7011 Weight: 191 kg Application: The workbench is used for extracting non-explosive, dry dust and gases. The table is designed for both standing and seated work with full knee clearance, focusing on ergonomics. For even more efficient work, the extraction table offers a wide range of optional accessories: - Back wall, side walls, and ceiling – optionally with soundproofing and lighting - Slats made of wood, steel, stainless steel, or plastic - Perforated steel plate on top of wood slats - Vise holder - Holder for pipe welding - Spot extraction arm Your advantages of the ISI-Flow Desk series: - 12 device variants available - Piping can be connected on the right, left side, or on both sides - Electric height adjustment at the push of a button - Wide range of mounting and connection accessories - Quality Made in Europe The ISI Air extraction table must not be used in conjunction with ATEX zones. Ijdpezdtwzofx Ag Aeba The images may contain accessories.

Condition: new, functionality: fully functional, total height: 938 mm, total length: 2,000 mm, total width: 1,100 mm, overall weight: 100 kg, Equipment: CE marking, documentation/manual, type plate available, ISI-FLOW DESK Standard – 1000S – 1700 m³/h Extraction table, suitable for gluing, sanding, polishing, welding, or manual cutting. The ISI Flow Desk 1000 S extraction table is a simple standard workbench for extracting non-explosive, dry dust and gases. TECHNICAL DESCRIPTION: Possible extraction capacity: 1700 m³/h Work surface W/D in mm: W 980 / D 960 Work height in mm: H 638-938 mm Table load: 150 kg/m (wood, with evenly distributed load) Work surface: Wooden slats (optional steel, stainless steel, or plastic slats) Overall dimensions W/D/H in mm: W 1076 / D 1000 / H 938 (other lengths and depths available as options) Fan capacity: without fan Pipe connection: D=161 mm Color: RAL 7042/RAL 7011 Weight: 100 kg Application: The workbench is used for extracting non-explosive, dry dust and gases. It can be used as a gluing, sanding, polishing, welding, or manual cutting table. Isdpfx Ajzdtqujg Aeba Your advantages of the ISI – Flow Desk series: - 8 device variants available - Simple connection to extraction system via nozzle at the end of the table - The design of the table allows working from 3 sides - Height adjustment - Wide range of assembly and connection accessories - Quality Made in Europe The ISI Air extraction table must not be used in conjunction with ATEX zones.

Condition: used, Year of construction: 2011, Mobile dust extraction system, Schuko connection, diameter 160 mm Ibedpfx Aszmag Ijg Aoa Dimensions L/W/H in mm: 2045x870x2125 Power: 2.2 kW

Condition: new, Year of construction: 2025, functionality: fully functional, power: 11 kW (14.96 HP), input voltage: 400 V, type of input current: three-phase, volume flow: 9,000 m³/h, suction capacity: 9,000 m³/h, intake manifold diameter: 300 mm, filter area: 165 m², noise level: 70 dB, total height: 2,500 mm, total length: 1,980 mm, total width: 990 mm, overall weight: 450 kg, space requirement height: 2,500 mm, space requirement length: 2,000 mm, space requirement width: 1,000 mm, warranty duration: 12 months, Equipment: documentation/manual, 1. Product Description The Airtech extraction unit is a horizontally installable, integrated dust separation system (cartridge filter unit) equipped with multiple filter cartridges. It is designed for applications with small to medium volume flows and offers high particle separation efficiency. Main Features: - Multiple filter cartridges arranged horizontally provide a compact and maintenance-friendly design. - Particularly suitable for industrial applications where constant and reliable dust extraction is required. Your Benefits Iedpoxx Ia Hsfx Ag Aeba - High filtration efficiency & air quality: The multi-stage filtration effectively retains fine dust particles, contributing to cleaner air and extending the service life of your production equipment. - Compact design: The horizontal layout saves space and simplifies integration into existing systems. - Low maintenance: Easy access to filter cartridges allows for efficient inspection, cleaning, or replacement. Powerful: The 11 kW blower ensures strong suction power and stable extraction performance even in challenging applications. Delivery ex works / ex stock Installation and commissioning (optional): available on request by our trained technical staff. Spare parts (filter cartridges) as well as maintenance contracts can be offered separately to maximize system uptime.

Condition: new, 3 waste bags capacity 8000 m3/h motor power 7.5 kW bag shaking mechanism air return channel power supply 380V Ijdezqa Tijpfx Ag Ajba

Condition: ready for operation (used), Specifications: Supply voltage | V | 230 Frequency | Hz | 50 Run Hours: 2690 hours Type of current | Ph | 1. Engine power | kW | 2.4 Ijdpfxsxvpumo Ag Ajba Air flow volume max. | m³/h | 640 Negative pressure max. | Pa | 15000 Protection class | | IP54 ISO class | | F Extraction performance | % | >99 Width | mm | 365 Depth | mm | 768 Height | mm | 801 Weight | kg | 70 Sound pressure level | dB(A) | 70 Allowed ambient temperature | °C | +5 to +35 (during operations) | | -10 to +40 (during transport and storage) Max. temperature of polluted air at the capture point | °C | +50 Allowed max. humidity | % | 70 Good working condition. Please check out our other listings as well.

Condition: used, This listing is for 1 of 4 Liferiver EX3600 Extraction System. The unit is in full working condition and is ready for immediate release. The Liferiver EX3600 is a cutting-edge, fully automated nucleic acid extraction system designed to enhance laboratory efficiency and convenience. Here’s a detailed overview of its standout features and applications: Key Features: - Versatile Sample Volume: The EX3600 can process a wide range of sample volumes, from 20 to 200 microliters, making it suitable for diverse applications and sample types. Ibsdpsxxyf Ijfx Ag Aoa - High Throughput: Capable of handling up to 24 samples in a single run, the EX3600 significantly boosts productivity, particularly in high-demand research environments. - User-Friendly Interface: The integrated LCD screen provides clear, real-time monitoring of the extraction process, allowing users to easily track progress and make adjustments as needed. - UV Sterilization: Equipped with a UV lamp, the system ensures sterilization of the working area, which is crucial for preventing contamination and maintaining sample integrity. - Quick Processing Time: The entire nucleic acid extraction process takes approximately 20 minutes, enabling rapid turnaround for critical experiments, such as those in diagnostics or research settings. - Magnetic Bead Technology: Featuring a magnetic bar for efficient handling of magnetic beads, the EX3600 streamlines the extraction process, reducing manual intervention and minimizing errors. Applications: - Whole Blood and Plasma: Ideal for clinical applications, particularly in genetic testing or infectious disease diagnostics. - Serum Samples: Useful in biomarker discovery and research. - Cells: Supports cellular research and analysis. - Food Samples like Milk: Perfect for food safety testing and microbiological analysis. - Fecal Samples: Essential for studies in microbiome research or gastrointestinal health. - Specialized Use: - The EX3600 is particularly effective for extracting viral RNA, making it a valuable tool in the fight against infectious diseases, including COVID-19 detection. Trained laboratory personnel can prepare samples before utilizing the automated system, ensuring consistent and reliable results.

Condition: used, This listing is for the BioBase BNP32/BNP48 Nucleic Acid Extraction System The unit is in full working condition and is ready for immediate use The BNP32/BNP48 system is a fully automated clinical nucleic acid extraction platform that delivers walk-away automation, designed to minimize user intervention and reduce extraction-to-extraction variability. Ideal for both clinical and research settings, it ensures consistent performance and high-quality purified eluates. In addition to efficient nucleic acid extraction, the system offers: Onboard primary-sample handling Mixed-batch sampling Support for up to 32 or 48 samples per run, depending on the model Key Features Sample Capacity: Up to 32 (BNP32) or 48 (BNP48) samples per run Sample Volume: 20–500 µL per sample Processing Volume: 60–1000 µL Extraction Time: 8–60 minutes per round, depending on reagents Magnetic Bead Recovery: Greater than 98% Reagent Compatibility: Open system compatible with magnetic bead-based reagents Temperature Control: 8 independent heating modules with customizable lysis/elution temperatures Mixing Modes: Oscillating mixing (low/medium/high speeds) Iedpfsxv Dl Hex Ag Aeba Program Storage: Stores up to 50,000 programs; USB import/export supported Touch Screen: 7-inch user-friendly interface Safety Features: Auto-pause on door opening, resumes upon closure

Year of construction: 2001, condition: used, functionality: fully functional, Used wet and dry vacuum cleaner (dust extraction system) in good condition. Extraction capacity: 1,800 m³/h. Ibodpfx Agszb Ipuo Aea

Condition: used, We are selling a used extraction unit, model IES 20-35-4 / 11MD, manufactured by Ulmatec. The drive power is 11 kW. If you have any further questions, please feel free to contact us! Iodpfjxxxwcjx Ag Ajba

Condition: new, Year of construction: 2026, functionality: fully functional, type of input current: three-phase, filter area: 200 m², volume flow: 25,000 m³/h, total width: 2,450 mm, total length: 3,600 mm, total height: 7,000 mm, overall weight: 4,000 kg, Equipment: documentation/manual, DUSTY AIR FILTER - ATEX zone 22 Design air flow: 25,000 m³/h Structure: galvanized sheet metal, press bent and bolted, thickness 2-3-4 mm Total filter surface: 200 m² Filter media: antistatic 500 g polyester Explosion relief ventilation panels in horizontal position Discharge: motorized auger 1.1 kW, rotary valve 0.75 kW Iodjzfi Daepfx Ag Aeba Upper safety railing Safety ladder Electrical control panel for machinery

Condition: good (used), Year of construction: 1994, functionality: fully functional, Nestro Dust Extraction System Dust Extraction Nozzle D = 160 mm Motor power 2.2 kW Filter area approx. 11.5 m² External dimensions L x W x H approx. 1350 x 860 x 1960 mm Weight approx. 240 kg One chip collection bin / approx. 185 l Max. rated volume flow 1780 m³/h Isdpfjzhv Nnsx Ag Asba Associated negative pressure approx. 2400 PA All information is subject to change. This information was taken from a brochure.

Condition: ready for operation (used), Streuli SHS15 / STE15 Belt Filter System, Filter System, Filter Dimensions: 1760mm x 1210mm x 1850mm (W x D x H) Weight: approx. 725 kg You are welcome to visit us for an inspection. We can also arrange cost-effective shipping for you! You will receive a proper invoice. For foreign customers, a net invoice can also be issued. A valid VAT identification number is required. Subject to prior sale. Visit our shop and see our other offers. The company names and trademarks mentioned are the property of their respective owners and are used solely for identification and description of the products. Ibedpfx Agjzhlgve Aoa Deviations from technical data as well as errors in the description of the item may occur and are subject to change.

Condition: ready for operation (used), Year of construction: 2008, machine/vehicle number: 8011510B, functionality: fully functional, filter area: 72 m², production capacity: 80,000 unit/h, Equipment: CE marking, TECHNICAL DETAILS Capacity: 80,000 m³/h Number of filter bags: 384 pcs Filter length: 2,500 mm Filter diameter: 230 mm Filter area: 72 m² MACHINE DETAILS Connected load: 15 kW Ijdpfx Aey Ai Tfsg Asba Weight of upper section with motors: 4,000 kg Weight of intermediate section with filter sleeves: 4,000 kg Weight of lower section with legs: 2,000 kg Main fan: 12 pcs Power of main fan: 15 kW Nominal air flow: 22 m/s EQUIPMENT Return lines Control cabinet CE marking Extinguishing system Control cabinet Shaking system Vacuum installation Note: The machine has already been dismantled.

Condition: new, Year of construction: 2026, functionality: fully functional, input voltage: 230 V, suction capacity: 1,200 m³/h, total height: 610 mm, total length: 800 mm, total width: 625 mm, overall weight: 100 kg, The LTA E 120 air filter extraction system is an electrostatic filtration system specifically designed for the separation of oil and emulsion mists in industrial applications. Such systems are characterized by consistently high separation efficiency and contribute to sustainable production. A key feature of LTA filtration systems is the automatic cleaning in place (CIP) system, which ensures consistently high filtration efficiency and long-term operational reliability. This system automatically cleans the filter elements with the cooling lubricant used in the machine, without the use of chemical additives or diluted solutions. Isdov S E H Ujpfx Ag Ajba

Condition: new, Year of construction: 2026, functionality: fully functional, input voltage: 400 V, suction capacity: 1,200 m³/h, total height: 2,970 mm, total length: 930 mm, total width: 930 mm, overall weight: 250 kg, LTA (JUNKER Group) mechanical dust filtration systems capture and remove dust and fumes in industrial applications. They use cartridge or bag filters to reliably capture even the finest particles. Thanks to automatic filter cleaning, they offer consistently high separation efficiency and are available as mobile or stationary systems. Iedpfov S E Ncsx Ag Ajba