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开采技术条件研究
| 程度
| 开采技术条件研究 | |
| tech. | investigation of mining-technical conditions |
| 程度 | |
| gen. | level |
| econ. | measure |
| hydroel.st. | extent |
| met. | plane; rate; scale |
| progr. | stage |
| tech. | degree |
| 程度 ^b1 | |
| gen. | degree |
| |||
| investigation of mining-technical conditions | |||
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开采技术条件研究 : 2 phrases in 1 subject |
| Technology | 2 |
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