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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, An O-ring 10 is further dispose at that upper portion of the packing assembly 9, An upper part of that O-ring 10 is provide 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, the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity, the two O-rings 10 are concentric arranged, and the inner diameter and outer diameter of the two O-rings are different.自从化名“美女蛇”的高级特务出任萍乡“剿共特别顾问”后敌保安局，警察局到处抓人、暗杀，致使我地下党组织遭到严重破坏。陈洪烈是红军侦察员，他的任务是为红军搞到急需药品。当地共青团组织为搞清陈洪烈的真实身份。沉着的陈洪烈看出了他们的破绽机智地同他们对上了暗号。陈洪烈利用何通为父送殡之机将药品放在棺材的夹层里。药品由黄开泰运送上山，但陈洪烈等人却落入敌人之手，在地下党的设计诱出了“美女蛇”，原来他就是卖药人胡宝堂。以三个性格迥异的儿子为中心，透过经历结婚和离婚，悟出婚姻的真谛！机器少女法兰姬第二季这虎王寨的人身手不错，让他们迟一步走，再加上林队长留下的人，足够了。23. Skills Competition and Performance AppraisalA group of friends make a bet to see who can survive camping on an island for a night. Unbeknownst to them, a strange creature lurks throughout the night terrorizing their every move, and sound is their biggest enemy.