DIFF Subgroup
B21B 17/12 in a discontinuous process
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 > in a discontinuous process
No child classifications to compare. This is a leaf node in both IPC and CPC.