pitshaft

  • 网络竖井;井筒
1.
竖井
P ... pit prospecting method 坑探法 pit shaft 竖井 pit slope 露天矿边坡 ...
course.cug.edu.cn|基于3个网页
2.
井筒
foundation pit engineering_翻译 ... 缺陷: Pit 井筒Pit shaft 冲刷坑: scoured pit ...
www.lw23.com|基于 1 个网页