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PCE
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DIFF Subgroup
C21D 7/12

by expanding tubular bodies

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Modifying the physical properties of iron or steel by deformation > by cold working > of the whole cross-section, e.g. of concrete reinforcing bars > by expanding tubular bodies

CPC:

Modifying the physical properties of iron or steel by deformation (apparatus for mechanical working of metal B21, B23, B24) > by cold working > of the whole cross-section, e.g. of concrete reinforcing bars > by expanding tubular bodies

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