CPC Main Group
F01B 29/00 Machines or engines with pertinent characteristics other than those provided for in preceding main groups
3 direct subcodes
Child Classifications
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- F01B 29/02 Atmospheric engines, i.e. atmosphere acting against vacuum
- F01B 29/04 characterised by means for converting from one type to a different one
- F01B 29/08 Reciprocating-piston machines or engines not otherwise provided for