DIFF Subgroup
C21B 7/04 with special refractories (refractory materials C04B)
Introduced: September 1968
Title
Titles differ between systems:
IPC: with special refractories
CPC: with special refractories (refractory materials C04B)
Full Title
Full titles differ between systems:
IPC:
Blast furnaces > with special refractories
CPC:
Blast furnaces (lifts associated with blast furnaces B66B9/06) > with special refractories (refractory materials C04B)
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
Navigate with arrow keys, Enter to open