郑煤集团
郑煤集团-
锚喷支护在郑煤集团的发展及应用
Development and Application of Bolting and Shotcreting Technology in Zhengzhou Coal Group Company
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目前，该系统已在郑煤集团投入使用，运行状况良好。
Now , the system is working well for railway of Zhengzhou Coal Corp.
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浅谈郑煤集团物资供应管理体制改革
A Look into the reform of the management system of goods and materials supply in Zhengzhou Coal Industry Group