Horizontal Directional Drill的用法和樣例：
例句
- Directional drilling is an advanced construction method in river crossing.
定向鑽穿越河流是一種比較先進的施工方法。 - Research on mechanical parameters of pipeline crossing by horizontal directional drilling is rare and the engineering is almost designed by experiential method.
水平定向鑽管道穿越中力學參數的理論化可為工程實際提供參考。
