LSD斜井滑模系统
LSD Inclined Shaft Slip-form System
斜井螺杆泵
declining-well screw pump
斜井扩腔
expanding cavity in slant well
斜井开挖
excavating of inclined shaft
excavation of inclined shaft
excavation for inclined shaft
斜井开拓
opening up by inclined shafts
斜井井筒施工
inclined shaft construction
斜井混凝土衬砌
concrete lining of inclined shaft