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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C02F1/00 Treatment of water, waste water, or sewage
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C02F1/50 by addition or application of a germicide or by oligodynamic treatment
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