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| 公开/私有: | 公开 私有 |
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| 公开/私有: | 公开 私有 |
- mining engineering (10)
- 研究 (9)
- 矿山开采 (8)
- mines and mineral resources (7)
- 矿业工程 (7)
- 英语 (7)
- 教材 (6)
- 高等学校 (4)
- mine safety (3)
- mineral industries (3)
- 煤矿开采 (3)
- 高等教育 (3)
- environmental aspects (2)
- metallurgy (2)
- technological innovations (2)
- 手册 (2)
- 煤层 (2)
- 矿山安全 (2)
- abandoned mined lands reclamation (1)
- airplanes (1)
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