 |
| |||
| ceiling beam | |||
| ceiling beam | |||
| crown board | |||
| ceiling (выработки) | |||
| roof coal; arch pillar; cap pillar; floor pillar | |||
| crown pillar (Jewelia) | |||
| потолочина: 2 短语, 2 学科 |
| 矿业 | 1 |
| 马卡罗夫 | 1 |
|
| |||
| ceiling beam | |||
| ceiling beam | |||
| crown board | |||
| ceiling (выработки) | |||
| roof coal; arch pillar; cap pillar; floor pillar | |||
| crown pillar (Jewelia) | |||
| потолочина: 2 短语, 2 学科 |
| 矿业 | 1 |
| 马卡罗夫 | 1 |