Excavate coal is primary production link in coal mine production, therefor, Weaving excavate coal working face supersedure plan has instructional meaning.
采
是
产中的主要产环节,因而编制采工作面接替计划对产具有指导
。
Excavate coal is primary production link in coal mine production, therefor, Weaving excavate coal working face supersedure plan has instructional meaning.
采是产中的主要产环节,因而编制采工作面接替计划对产具有指导。
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