TT40型水平导向钻机+TT145夯管锤应用
TT40-type Horizontal Directional Drill + TT145 Rammer applications
高速径向钻孔机
high speed radial drilling machine
横向钻孔机
horizontal earthboring machine
短螺旋钻机钻孔成桩工艺
Drilling-into-pile techniques by the Short Spiral Drill
背门导向机构
tail door guiding mechanism
垂直导向钻井
steerable vertical drilling
导向机制
Oriented attachment mechanism
导向孔对接
pilot-hole interconnetion