... lower prop 下柱 lower seam 下层 lower slice 下分层 ...
基于66个网页-相关网页
... lower labium 下唇 lower seam 低层 lower sublittoral zone 底亚滨海带 ...
基于60个网页-相关网页
lower neighbouring coal seam 下邻近层
lower r seam 低层
lower coal seam 下部煤层
lower protective seam 下保护层
lower protective seam mining 下保护层开采
·2,447,543篇论文数据，部分数据来源于NoteExpress
Coalface of Daizhuang Coalmine, the authors believe that the roof in lower seam will form the "block-bulk-beam" structure easy to fall after the mining of top ultra-close seam.
通过对岱庄煤矿4300采区工作面的顶板结构分析，得出了上部极近距离煤层开采后，下部煤层顶板形成极易漏冒的“块体-散体-梁”结构。
youdao
应用推荐
模块上移
模块下移
不移动