DIFF Subgroup Additional Only
E04F 2201/0523 Separate tongues; Interlocking keys, e.g. joining mouldings of circular, square or rectangular shape
Full Title
Joining sheets or plates or panels > Separate connectors or inserts, e.g. pegs, pins, keys or strips > Separate tongues; Interlocking keys, e.g. joining mouldings of circular, square or rectangular shape
Of 7 combined children, 0 exist in both systems.
7 codes are CPC-only extensions.
Note: 7 CPC extensions are marked as secondary classification only.