DIFF Subgroup
B23C 3/051 Full Title
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 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.