DIFF Subgroup
B21B 27/08 internally
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Rolls; Lubricating, cooling or heating rolls while in use > Lubricating, cooling, or heating rolls > internally
CPC:
Rolls, (shape of working surfaces required by special processes B21B1/00); Lubricating, cooling or heating rolls while in use > Lubricating, cooling or heating rolls > internally
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Note: 2 CPC extensions are marked as secondary classification only.
Child Classifications
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