Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B04
CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
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B04C
APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
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11/00
Accessories, e.g. safety or control devices, not otherwise provided for; , e.g. regulators, valves in inlet or overflow ducting
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