1. The malfunction is less , the maintenance is simple and convenient. 
2. Turn round 90 degree arbitrarily and is suitable to various circumstance 
3.Use pipeline of breaker directly. (there is no need to install another pipeline ) 
4.adopt the vibration board which made from peculiar endure steel 
5. The inner sets up Wear Plate device in order to decrease the shake loss between big arms and the pole of excavator
Use:
1.The densification of slope road project 
2.the densification of Building foundation project 
3.The densification of Dike and dam slope 
4.The re-buries densification of range the pipeline project 
5. The densification of watering and terrane