TURCON R STEPSEAL R2K-Single Acting--Rubber Energised Plastic Faced Seal--Material--Turcon R and Zurcon R-Turcon R Stepseal R2KTurcon R Stepseal R 2K*DescriptionRod seals must exhibit no dynamic leaka

阀体铸造中国最长的铁路隧道——乌鞘岭隧道，总投资78亿元乌鞘岭“地扼东西孔道，势控河西咽喉”远望乌鞘岭，像极了⼀条蜿蜒盘旋的乌龙，⼭岭及岭上的树⽊植被⼀律呈墨绿⾊，没有植被的⼭⽯及裸露的⼟坡也呈现灰⿊⾊，给⼈留下乌⿊厚重的印象，谓之“乌鞘岭”名⾄实归。素以⼭势险峻、地势险要⽽驰名于世，乌鞘岭为丝绸之路的东⼤门，扼守要冲。马钱子散气体常数乌鞘岭位于⽢肃省天祝藏族⾃治县的中部，属于祁连⼭的东南端，是陇

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