[矿业]
high seam mining method
... 厚煤层 thick coal seam 厚煤层采煤法 high seam mining method 后爆炮眼组 back hole ...
基于6个网页-相关网页
短语
倾斜厚煤层采煤法
[矿业]
inclined high seam mining method
倾斜特厚煤层采煤法
[矿业]
inclined superhigh seam mining method
中厚煤层采煤法
[矿业]
medium-thickness seam mining method
·2,447,543篇论文数据，部分数据来源于NoteExpress