Rubber dam:
1)Composition:high-strength synthetic fabric,rubber
2)Function:store and use water
3)Riveted on the base board

Fin rubber dam:

1.Fin rubber dam are made of high-strength synthetic fabrics supported by a frame and prefabricated rubber,riveted on the base board.

2.Forming a sealed bag-shape space,which shall be inflated with water or air in drouthy seasons to store water for industry,agricultural and daily use.In rainy seasons,water contained indam shall be discharged to help release floodwater from the river course.

3.Currently the fin rubber dam is the desirable in the world.The fin breaks the unity of flowing water passing the dam,it is effective to reduce the vibration of rubber dam,and prolong the rubber dam life time.