PE管冲孔
the punching of holes in PE pipe
水力冲孔
hydraulic flushing
hydraulic flushing borehole
三面冲孔生产线
Production line with punch in three s ides
Punching line
泥浆护壁冲孔灌注桩
pound piling with hole slurry protected
立式水压冲孔
Vertical hydraulic piercing
空心锤冲孔法
punching method with hollow hammer
可重构压窝冲孔机
Reconfigurable bulging puncher