Excellent of pneumatic
(1)Simply Construction, take down easy. 
(2)No dangerous of explosive.
(3)Air source is convenience, easy transfer and save it.
(4)Easy adjusted for the pressure.
(5)Fast, speed control easy.
(6)Operate wide of temperature, overload no dangerous.
(7)Repair easy, strong.
(8)Adjustable for stroke and don’t need return function.
(9)It is Cleaning, no pollution.



Defective of pneumatic
(1)To get a smooth and equal velocity is difficult.
(2)Have a range with the operation pressure.
(3)Some noise when exhaust.