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A low temperature stop valve, Unlike Example 1, Comprises a valve body 1 and a valve cover 2, A valve stem 3 is arrange in that valve body 1, One end of the valve stem 3 is provided with a valve disc 4, The other end of the valve stem 3 is provided with an adjusting handwheel 5, A low portion of that disc 4 is provided with a guide sleeve 6, The guide sleeve 6 is fixed by means of a connecting piece and a spring pad 8, Between that disc 4 and the guide sleeve 6 is provide a valve seat 7, Between that valve stem 3 and the valve cov 2 there is provided a packing assembly 9, The O-ring 10 is further arranged at the upper part of the packing assembly 9, the upper part of the O-ring 10 is provided with a packing gland 11, the valve body 1 is provided with an arc-shaped end face 12, the arc-shaped end face 12 forms a line seal between the valve body 1 and the valve seat 7, the contact end of the valve disc 4 and the valve seat 7 is provided with a water grain surface 41, the packing assembly 9 comprises a flexible graphite packing layer, and the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity.The mobile phone experts around you一个预科学校的学生，对高纯度可卡因走私万美元到1984在美国的真实故事。预科生的连接记录一批私立学校的学生谁跑药品配送作业在上世纪80年代初的功勋。故事的主角托比，下层阶级的奖学金的学生，他利用自己的名声和药物的获取与受欢迎的孩子交朋友，最终让他培养一个贩毒网络。托比得到的远超过他的头他带他的朋友到哥伦比亚贩毒集团的危险的世界。《青春同学会》不仅为明星班设计专属“同学村”，开启了一段四天三夜的“时光重现之旅”，还创造综艺+公演的特殊节目形式，为明星班打造独立的专属影棚与舞台，邀请影视戏剧导演亲自指导明星班级在四天内独立完成一部戏剧并进行公演。[Collection Value]Console.log (application.getName ()); //tugenhuaTwo, point to set the following "notice";