Excavate coal is primary production link in coal mine production, therefor, Weaving excavate coal working face supersedure plan has instructional meaning.
是生产中的主要生产环节,因而编制作面接替计划对生产具有指导性意义。
Excavate coal is primary production link in coal mine production, therefor, Weaving excavate coal working face supersedure plan has instructional meaning.
是生产中的主要生产环节,因而编制作面接替计划对生产具有指导性意义。
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