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full retreat mining
| system
| full retreat mining | |
| tech. | 全面后退式开采 |
| system | |
| gen. | 体 |
| IMF. | 安排 |
| interntl.trade. | 系统分析 |
| met. | 系; 装置 |
| tech. | 制度; 体系; 系统; 方法 |
| |||
| 全面后退式开采 | |||
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full retreat mining system : 2 phrases in 1 subject |
| Technology | 2 |
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