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PCE
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DIFF Subgroup
B21H 1/22

characterised by use of rolls having circumferentially varying profile

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Making articles shaped as bodies of revolution > characterised by use of rolls having circumferentially varying profile

CPC:

Making articles shaped as bodies of revolution (rolling tubes B21B17/00 - B21B25/00) > characterised by use of rolls having circumferentially varying profile

No child classifications to compare. This is a leaf node in both IPC and CPC.