DIFF Subgroup
F24F 7/06 with forced air circulation, e.g. by fan
Introduced: September 1968
Full Title
Ventilation > with ducting systems > with forced air circulation, e.g. by fan
Of 3 combined children, 2 exist in both systems.
1 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1980.
Child Classifications
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