overhand mining

- Metalloid Toxicant的日志 -... ... overgrinding 过度碎磨 overhand mining 上向梯段回采 overhand stope 上向梯段回采工祖 ...

汉英常用采矿工程词汇 - 豆丁网 ... 单体液压支柱 hydraulic prop 倒台阶采煤法 overhand mining 底板 floor ...

采矿工程专业英语词汇册... ... underhand mining 俯采 overhand mining 仰采 Coal mining machine,coal-getting machine 采煤机…