DIFF Subgroup
B21H 1/18 cylinders, e.g. rolled transversely
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Making articles shaped as bodies of revolution > cylinders, e.g. rolled transversely
CPC:
Making articles shaped as bodies of revolution (rolling tubes B21B17/00 - B21B25/00) > cylinders, e.g. rolled transversely
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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