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PCE
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DIFF Subgroup
B21D 51/10

conically or cylindrically shaped objects

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Making hollow objects > characterised by the structure of the objects > conically or cylindrically shaped objects

CPC:

Making hollow objects (from thick-walled or non uniform tubes B21K21/00) > characterised by the structure of the objects > conically or cylindrically shaped objects

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