全密封(feng)結構，無油耗，免維護，綠色環保型產(chan)品，產(chan)品性能符(fu)合 EN81-1 要求， 每次動(dong)作(zuo)后不(bu)需要人員調整開關打(da)桿垂直(zhi)位置(zhi)。

 Sealed without any oil leakage, free of maintenance. the are green productes, these buffers are produced and tested copmletely in conformity with EN81-1, It is not necessary to make any adjustment of the swicth activating rod when it is compressed.