气垫钻井平台 air cushion drilling platform ; [油气] drilling hover platform

假垫层钻石 false doublet

钻杆垫叉 drill rod padding fork

垫圈钻模 drill jig for gasket

格尔夫垫型钻 Graff Cushion Cut

气垫式钻支 Drill air-leg ; Air-leg drill

定柱沉垫式钻井平台 bottom supporting drilling platform

钻孔垫板 pcb

透明钻孔垫板 UV

钻光气垫 drilling air cushion