Hydraulic Hinge

The hinges,adopts the small flowing tubing head pressure stick and the hinge organic synthesis
The hinges,adopts the small flowing tubing head pressure stick and the hinge organic synthesis,forms can expand and contract the free principle by the flowing tubing head pressure stick,causes the hinge to open and close.When opening width with the hands when the angle gate reaches 40or50 degrees,ds against hits ,with the deafended function.