- extracting level
- working floor
- 回采: backstoping; recovery; stopp ...
- 水平: horizontal; level standard; ...
- 开采水平: galley level; mine level
- 主要开采水平: principal mining level
- 回采: [矿物学] backstoping; recovery; stopping; extraction 快速回采 fast extraction; 回采工作面 stope; stope face; heading stope; 回采巷道 stope drift active workings; 回采率 [矿物学] rate of recovery; percentage of recovery; recovery; 回采平巷 extraction drift; extraction gallery; 回采损失mining loss
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