Patent classifications
C
CHEMISTRY; METALLURGY
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C02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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C02F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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2301/00
General aspects of water treatment
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C02F2301/02
Fluid flow conditions
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C02F2301/026
Spiral, helicoidal, radial
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