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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, 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, the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity, and the two O-rings 10 are respectively arranged on the inner side and the outer side of the packing gland 11.Chapter 4Taking the CSRFTester tool as an example, the testing principle of the CSRF vulnerability detection tool is as follows:自上世纪五十年代直至未来，七位殿堂级导演各自抽签负责一个年代，执导一个与香港有关的故事。《七人乐队》片名寓意各有风格才华的导演，尤如出色的乐手，走在一起便能合奏出令人共鸣的美妙乐章。其中包括洪金宝的《练功》、许鞍华的《校长》、谭家明的《别夜》、袁和平的《回归》、杜琪峯的《遍地黄金》、林岭东的《迷路》，及徐克的《深度对话》。其中林岭东的《迷路》更是导演的最后遗作。(two) the medical service behavior is real, but the declared items and amounts are not consistent with the real service behavior, and the difference is not big;毒舌KOL丁宥迎会于网上发布教授化妆技巧及新产品评测的影片。霸气能干的富家女雷紫彤创立自家化妆品品牌，却得到迎的劣评。二人纠缠间，彤遭遇意外而失忆，心智更有如小学生。彤父威逼利诱迎保守秘密及照顾彤，他设法助彤回复记忆，并助她解决各样难题。; ` * t + c # e $A5 q! O + f