DIFF Subgroup
C21D 7/13 by hot working
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Modifying the physical properties of iron or steel by deformation > by hot working
CPC:
Modifying the physical properties of iron or steel by deformation (apparatus for mechanical working of metal B21, B23, B24) > by hot working
No child classifications to compare. This is a leaf node in both IPC and CPC.