CPC Subgroup
F01C 21/06 Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L)
Full Title
Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00 > Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L)