C25F	PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR (treatment of water, waste water or sewage by electrochemical methods C02F 1/46; anodic or cathodic protection C23F 13/00)[2]
	Note(s) In this subclass, the last place priority rule is applied, i.e. at each hierarchical level, in the absence of an indication to the contrary, classification is made in the last appropriate place [2]