MacDonald Environmental Systems Inc. - Dust collectors, pneumatic conveyors, fans, rotary air locks, high/low pressure systems, filter units, cyclones, shredders, hogs, balers, bag housing, spark detection, and waste handling. - http://www.macdonald-esi.com
Fisher-Klosterman, Inc. - Air pollution control, dust collection, petroleum refining and product recovery equipment, systems, and accessories, including cyclones,scrubbers, baghouses, cartridge collectors, classifiers, and related services - http://www.fkinc.com
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