DIFF Subgroup
B23C 3/05 Finishing valves or valve seats
Introduced: July 1974
Full Title
Full titles differ between systems:
IPC:
Milling particular work; Special milling operations; Machines therefor > Milling surfaces of revolution > Finishing valves or valve seats
CPC:
Milling particular work; Special milling operations; Machines therefor (milling gear-teeth B23F, ) > Milling surfaces of revolution (B23C3/06, B23C3/08 take precedence) > Finishing valves or valve seats
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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