Excavate coal is primary production link in coal mine production, therefor, Weaving excavate coal working face supersedure plan has instructional meaning.
采煤是煤矿生
主要生环节,因而编制采煤工作面接替计划对煤矿生具有指导性意义。
Excavate coal is primary production link in coal mine production, therefor, Weaving excavate coal working face supersedure plan has instructional meaning.
采煤是煤矿生主要生环节,因而编制采煤工作面接替计划对煤矿生具有指导性意义。
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