CPC Subgroup
F04B 37/20 for wet gases, e.g. wet air
Full Title
Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 > for special use (for evacuating by absorption or adsorption F04B37/02; for evacuating by thermal means F04B37/06) > for specific elastic fluids > for wet gases, e.g. wet air