DIFF Subgroup
B21C 9/02 Selection of compositions therefor
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Cooling, heating or lubricating drawing material > Selection of compositions therefor
CPC:
Cooling, heating or lubricating drawing material (B21C3/14 takes precedence) > Selection of compositions therefor
No child classifications to compare. This is a leaf node in both IPC and CPC.