 |
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| 露天矿从地表通过向下阶梯剥离开采金属矿、煤及其他非金属等矿床的作业形式; 露天开采 | |||
| opencasting: 2 phrases in 2 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 1 |
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| |||
| 露天矿从地表通过向下阶梯剥离开采金属矿、煤及其他非金属等矿床的作业形式; 露天开采 | |||
| opencasting: 2 phrases in 2 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 1 |