DIFF Subgroup
B21B 17/08 with mandrel having one or more protrusions
Introduced: September 1968
Full Title
Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling > with mandrel having one or more protrusions
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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