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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。
As Daihe Coal Mine stope and often face a lack of time for the equipment.
youdao
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介绍了这种装置在煤矿井下转弯巷道中的使用情况。
Describes the use of the device in coal mine roadway turning.
youdao
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介绍了这种装置在煤矿井下转弯巷道中的使用情况。
Describes the use of the device in coal mine roadway turning.
youdao