man digged piles

• 人工挖孔桩

man digged piles的用法和样例：

例句

1. 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。