DIFF Subgroup
F04C 23/005 Full Title
Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (F04C25/00 takes precedence)
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.