DIFF Subgroup
B21D 41/04 Reducing; Closing
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Application of procedures in order to alter the diameter of tube ends > Reducing; Closing
CPC:
Application of procedures in order to alter the diameter of tube ends (B21D39/00 takes precedence ) > Reducing; Closing
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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