IPC Main Group
C21B 3/00 General features in the manufacture of pig-iron
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- METALLURGY OF IRON
- Subclass:
- MANUFACTURE OF IRON OR STEEL
Related Keywords
production of pig IRON
2 direct subcodes
Child Classifications
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