It is of self-regulation function pressuer and keep asoft shock adsorbing effect with the variety of the impact velovity and veight of object The spring can make the piston diaplasis fastly with the perfect movement of the clapped valve. Adapting horniness chromeplated piston rod and special sealing element it can have long and stable efficiency It can be fixed adopting orientation stop screw cap,setting unt,retaining plate etc The unstandardized component can be also manufactured 1.Small bulk,compact structure suit the narrow space. 2.It can not be disassembled with high safely properties. 3.Full thread of outer pressure cylinder is of flexible installation and adjustment. 4.Load can not be directly acted on end face.Otherwise deformed end face will badly effect the stroke resetting.
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