 |
| |||
| filled flat-back overhand stoping; flat-back filled stoping; horizontal cut-and-fill stoping | |||
| söhliger Firstenstoßbau mit Versatz: 5 phrases in 1 subject |
| Mining | 5 |
|
| |||
| filled flat-back overhand stoping; flat-back filled stoping; horizontal cut-and-fill stoping | |||
| söhliger Firstenstoßbau mit Versatz: 5 phrases in 1 subject |
| Mining | 5 |