CPC Main Group
F02M 27/00 Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like
4 direct subcodes
Child Classifications
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- F02M 27/02 by catalysts
- F02M 27/04 by electric means, or magnetism
- F02M 27/06 by rays
- F02M 27/08 by sonic or ultrasonic waves