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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.The setting method is shown in the following figure描写了花市的反贪局侦察处处长冯勇刚直不阿，敢于和社会上恶势力作斗争，使他成为花市的英雄人物。可是，某日收到一封告密信，几乎使冯勇一世英名扫地。几经周折，冯勇终于和告密者晤面，岂料告密人正是他昔日的恋人白雪。当年冯勇和白雪倾心相爱，由于白雪的密友容秀芬从中作梗，以至两人分道扬镳。岂知，10年后两人却在这样的环境中重逢。《神探夏洛克》（Sherlock）2016年推出特别篇，福尔摩斯回归原著维多利亚时代，调查一宗神秘的幽灵新娘谋杀案。Thomas Ricoletti惊讶地发现，几小时前自杀身亡的妻子Emelia Ricoletti身着旧婚纱再次出现了，她的幽灵带着强烈的复仇欲望在街上徘徊。从迷雾笼罩的莱姆豪斯到被废弃的教堂深处，福尔摩斯、华生以及他们的朋友不得不想尽办法对付这个“从坟墓里爬出来”的敌人，但最终的真相却出乎所有人的意料……Leaders (leaders, meeting chairmen), discussion experts and coordinators影片讲述了一群加利福尼亚冲浪爱好者决定冒险开始追逐他们梦寐以求的好莱坞豪华生活。用先进的二手飞机从墨西哥飞行到加利福尼亚，同时带了大量的美沙酮。所有事都十分顺利，直到一个没有被证实真实身份的美女进入他们的生活后……考上全省第一名校青学高中的姜慕凡家境优越却内敛。正待玉树临风，意气风发，并被暂定为学习委员。可校园生活的种种机缘，让姜慕凡与林洛嫣产生了这样那样的接触，而冥冥之中，两个人的故事似乎也因此而美好的开始…不知不觉间，林洛嫣身上的美好特质让本来一直坚定地抱着决不早恋这份坚持的姜慕凡深深陷入一份不能自已的小鹿乱撞的朦胧中。难道…这就是初恋的感觉…？！姜慕凡不禁陷入一片慌乱的手足无措之中… 然而，更让姜慕凡陷入慌乱的是班级的“坏小子”邵天扬，似乎开始打起了林洛嫣的主意......还有职高女生，音像店老板的女儿，杜欣悦，她叛逆开放的性格，似乎对林洛嫣产生了潜移默化的影响…