全密封結構，無油(you)耗(hao)，免維護(hu)，綠(lv)色(se)環(huan)保(bao)型產(chan)品，產(chan)品性(xing)能(neng)符合(he) EN81-1 要(yao)求， 每次(ci)動作(zuo)后(hou)不需要(yao)人員調整(zheng)開關打桿垂直位置。

 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.