 |
| |||
| back coming; mining retreating; retreating system; working home; working-out-bye | |||
| retreating working | |||
|
exploitation en rabattant : 2 短语, 1 学科 |
| 冶金 | 2 |
|
| |||
| back coming; mining retreating; retreating system; working home; working-out-bye | |||
| retreating working | |||
|
exploitation en rabattant : 2 短语, 1 学科 |
| 冶金 | 2 |