A cylinder pneumatic lifting chair, piston cylinder rod up and down movement control chair lift, formal manufacturers are using nitrogen filling, the concentration of more than 99% in general, the pressure at one or two ATM. The lifting part has the following characteristics: press the switch valve lift when people sit up, too is to give the lifting shaft pressure, lifting shaft will fall gradually, uniform speed, can be reduced to the lowest point. Not to force the lifting shaft, the lifting shaft immediately back to the highest point, slightly faster, less than a second. (or not according to the press release when the valve switch halfway): lifting shaft at the current position, compression and tension can make it relatively mobile outer sleeve.
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