CPC Main Group Additional Only
F23N 2221/00 Pretreatment or prehandling
6 direct subcodes
Child Classifications
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- F23N 2221/02 using belt conveyors
- F23N 2221/04 Preheating liquid fuel
- F23N 2221/06 Preheating gaseous fuel
- F23N 2221/08 Preheating the air
- F23N 2221/10 Analysing fuel properties, e.g. density, calorific
- F23N 2221/12 Recycling exhaust gases