IPC Main Group
E21F 16/00 Drainage
Introduced: July 1974
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
Related Keywords
DRAINAGE of minesdraining PIT(S) in minesSUMP(S) in minesWINZES for draining mines
1 direct subcode
Child Classifications
Navigate with arrow keys, Enter to open
- E21F 16/02 of tunnels