CPC Subgroup
F01B 31/08 Cooling of steam engines; Heating; Heat insulation
Full Title
Component parts, details or accessories not provided for in, or of interest apart from, other groups > Cooling of steam engines; Heating; Heat insulation
F01B 31/08 Component parts, details or accessories not provided for in, or of interest apart from, other groups > Cooling of steam engines; Heating; Heat insulation