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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2103/00
Nature of the water, waste water, sewage or sludge to be treated
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C02F2103/02
Non-contaminated water, e.g. for industrial water supply
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