As Daihe Coal Mine stope and often face a lack of time for the equipment.

岱河煤矿是衰老矿井，由于受采场限制，常常出现没有时间装面的情况。

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As Daihe Coal Mine stope and often face a lack of time for the equipment.

岱河煤矿是衰老矿井，由于受采场限制，常常出现没有时间装面的情况。

youdao