The practice proves that comparing with conventional excavation technique, non -excavating horizontal directional drilling technique is obviously advantageous.
实践证明，非开挖水平定向钻进技术相对传统的开挖技术在特定条件下具有明显的优越性。
This paper gives a brief introduction to the cardinal principle of horizontal directional drilling technique and its application in the construction of sewer net.
本文介绍了水平定向钻进技术的基本原理及在污水管网建设中的应用。
This paper gives a brief introduction to the cardinal principle of horizontal directional drilling technique and its application in the construction of sewer net.
本文介绍了水平定向钻进技术的基本原理及在污水管网建设中的应用。
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