 |
| |||
| pulleying of pillars (stumps); robbery; robbing; robbing of pillars; second mining; second working; stooping | |||
|
zweiter Verhieb : 3 短语, 1 学科 |
| 矿业 | 3 |
|
| |||
| pulleying of pillars (stumps); robbery; robbing; robbing of pillars; second mining; second working; stooping | |||
|
zweiter Verhieb : 3 短语, 1 学科 |
| 矿业 | 3 |