1) The structure is simple and the gas consumption is small.
2) Using spring force or diaphragm force to reset, a part of the compressed air energy is used to overcome the spring force or diaphragm tension, thus reducing the output force of the piston rod.
3) Springs, diaphragms, etc. are installed in the cylinder, and the stroke is generally short;
4) The tension of the return spring of the cylinder and the diaphragm changes with the magnitude of the deformation, so the output force of the piston rod changes during the travel.
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