CPC Main Group
F01M 13/00 Crankcase ventilating or breathing
8 direct subcodes
Child Classifications
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- F01M 13/02 by means of additional source of positive or negative pressure
- F01M 13/04 having means for purifying air before leaving crankcase, e.g. removing oil
- F01M 13/06 specially adapted for submersible engines, e.g. of armoured vehicles