 |
| |||
| quarry face | |||
| life of face in terms of distance; panel length; panel life; run; face; coal face; length of advancing working; life of face in terms of distance | |||
|
brydningsfront : 5 短语, 1 学科 |
| 煤炭 | 5 |
|
| |||
| quarry face | |||
| life of face in terms of distance; panel length; panel life; run; face; coal face; length of advancing working; life of face in terms of distance | |||
|
brydningsfront : 5 短语, 1 学科 |
| 煤炭 | 5 |