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An improvement of mining method was carried out in Miaoling Gold Mine according to the change of mining conditions.
庙岭金矿针对矿体开采条件的变化,适时对采矿方法进行了改进。
youdao
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An improvement of mining method was carried out in Miaoling Gold Mine according to the change of mining conditions.
庙岭金矿针对矿体开采条件的变化,适时对采矿方法进行了改进。
youdao