DIFF Subgroup Additional Only
C02F 2001/5218 Full Title
Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence) > by flocculation or precipitation of suspended impurities
C02F 2001/5218 Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence) > by flocculation or precipitation of suspended impurities