1)punching pile driver, for boring hole of bridge 2)pile pit diameter from 600mm to 3500mm, special for large pile low price Punching ... frame, hammer, slurry pump and control tank.Punching pile driver suitable for drilling cast-in-place pile construction, it with obvious strongpoint ... ×2200×63007000×2000×70007000×2100×72007200×2000×7200 Punching Pile Driver For Boring Hole Of Bridge And Building