IPC Subgroup
E21C 27/04 by a single chain guided on a frame with or without auxiliary slitting means
Introduced: September 1968
Last revised: January 2006
Full Title
Machines which completely free the mineral from the seam > solely by slitting > by a single chain guided on a frame with or without auxiliary slitting means
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- MINING OR QUARRYING
1 direct subcode
Child Classifications
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- E21C 27/06 with a slewing frame