DIFF Subgroup
B21D 17/04 by rolling
Introduced: September 1968
Full Title
Forming single grooves in sheet metal or tubular or hollow articles > by rolling
No child classifications to compare. This is a leaf node in both IPC and CPC.
B21D 17/04 Introduced: September 1968
Forming single grooves in sheet metal or tubular or hollow articles > by rolling
No child classifications to compare. This is a leaf node in both IPC and CPC.