B PERFORMING OPERATIONS; TRANSPORTING
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B01 PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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B01L CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
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2400/00 Moving or stopping fluids
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B01L2400/04 Moving fluids with specific forces or mechanical means
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B01L2400/0475 specific mechanical means and fluid pressure
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B01L2400/0487 fluid pressure, pneumatics
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B01L2400/049 vacuum
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