1)drainage borehole,排水钻孔2)horizontal drilling drainage,水平钻孔排水3)drainage with drilling hole,钻孔排放4)drilling for ice blockage removal,排堵钻孔5)drill off silt,钻孔排碴6)silt removal by borehole,钻孔排淤
用法例句
A drainage borehole designed depth is 584.
永城矿区某矿排水钻孔设计孔深584。
The application of the rectifying a deviation and stabilizing technique through anchor rod static press pile and silt removal by borehole was expounded in detail.
