东山面

东山面东山面
  1. 东山煤矿51520工作面陷落柱治理

    Treatment of the Collapsing Column in 51520 Mining Face of Dongshan Coal Mine

  2. 东山煤矿71505工作面开采沉陷观测站设计

    The Design of the Mining Subsidence Observation Station of 71505 Working Face of Dongshan Coalmine