IPC Subgroup
C21B 13/06 in multi-storied furnaces
Introduced: September 1968
Last revised: January 2006
Full Title
Making spongy iron or liquid steel, by direct processes > in multi-storied furnaces
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- METALLURGY OF IRON
- Subclass:
- MANUFACTURE OF IRON OR STEEL