CPC Subgroup
F23N 3/06 by conjoint operation of two or more valves or dampers (by power-assisted systems F23N3/08)
Full Title
Regulating air supply or draught (conjointly with fuel supply F23N1/00) > by conjoint operation of two or more valves or dampers (by power-assisted systems F23N3/08)
1 direct subcode
Child Classifications
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