CPC Subgroup
F25B 1/10 with multi-stage compression (with cascade operation F25B7/00)
Full Title
Compression machines, plants or systems with non-reversible cycle (F25B3/00, F25B5/00, F25B6/00, F25B7/00, F25B9/00 take precedence) > with multi-stage compression (with cascade operation F25B7/00)