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| 露天工作; 【矿】露天开采; 露天开挖 | |||
| 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; 露天矿 | |||
| 管线的露明工程; 明线工程 | |||
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| 露天开采; 露天矿｛矿｝ | |||
| 露天开采、露天矿 | |||
| open work: 6 phrases in 5 subjects |
| General | 1 |
| Metallurgy | 1 |
| Polygraphy | 1 |
| Technology | 1 |
| Textile industry | 2 |
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