Two independent adjustable closing speed, by adjusting the two separate valves, 180 °, the entire section hydraulic control & have spent Can obtain the best closed-door speed and ensure safe locking. With special torque design, imported spring, imported high temperature, anti-frostproof and anti-wear oil &; Ease to open the door, all use lighter, terrier smoothly. Adopt independent carved forming technology, the casting of extensive. With the function of locking (90 °) and (180 ° no positioning) & have spent & have spent & have spent & have spent & have spent & have spent & have spent 
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