DIFF Subgroup
B01D 21/10 Full Title
Separation of suspended solid particles from liquids by sedimentation ( ; differential sedimentation B03D3/00; devices for separating or removing fatty or oily substances or similar floating material from water, waste water or sewage C02F1/40)
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.