定向钻孔 meaning in English

directional drilling
directional hole

Simulation method on directional drilling - hole course
定向钻孔轨迹的模拟方法
Research on technology and equipment of controlled directional borehole for drawing out of gas from coal mine
抽放瓦斯定向钻孔施工技术的研究
Construction of directional drilling hole is the key . slop prepare is the important ensuring of back - dragging successfully
定向钻孔的施工是关键，泥浆配备是回拖铺设成功的重要保证。