| |||
| back heading (Bewetterung); companion heading; counterhead; double entry; double heading; monkey gangway; parallel road; twin entry | |||
| air heading | |||
| parallel stretch | |||
|
Parallelstrecke : 1 phrases, 1 sujets |
| Exploitation minière | 1 |
| |||
| back heading (Bewetterung); companion heading; counterhead; double entry; double heading; monkey gangway; parallel road; twin entry | |||
| air heading | |||
| parallel stretch | |||
|
Parallelstrecke : 1 phrases, 1 sujets |
| Exploitation minière | 1 |