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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, A packing assembly 9 is arranged between the valve stem 3 and the valve cover 2, 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 which forms a line seal between the valve body 1 and the valve seat 7, and 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.一千个涌进来的人中，也许只会有一个半个能成为专职作者。Updated June 4本剧根据金庸小说改编，讲述了元朝末年，武林中盛传，谁能同时拥有屠龙刀和倚天剑，就将得知隐藏其中的巨大玄密，由此引发了武林中对于屠龙刀和倚天剑的争夺……两三年才能拍成电视剧？好吧，两三年就两三年，本姑娘等得起。Http://willgenovese.com/office-ddeauto-attacks/