The plan and technology of skip loading chamber construction in Jining No.

介绍了济宁二号煤矿箕斗装载硐室施工方案及技术。

youdao

The plan and technology of skip loading chamber construction in Jining No.

介绍了济宁二号煤矿箕斗装载硐室施工方案及技术。

youdao