manual pile foundations

• 人工挖孔桩

manual pile foundations的用法和样例：

例句

1. The jetting bore pile construction technique and the prevention and cure measure of trouble in construction were discussed in this paper.
   本文重点论述岩溶区不同地质条件下相应的冲孔桩施工方法和钻进事故防治措施。
2. The foundation of the pylon is composed of bored piles and separate pile caps connected with prestressed concrete tie beams.
   主塔基础采用分离式承台钻孔桩基础，两承台设横系梁连接，系梁为预应力混凝土结构。