DIFF Subgroup
C02F 1/487 Full Title
Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence) > with magnetic or electric fields (C02F1/46 takes precedence)
C02F 1/487 Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence) > with magnetic or electric fields (C02F1/46 takes precedence)