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New variable name: ClassPathA 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.Continue printing the public properties and methods as follows:《怪奇物语 Stranger Things》（原名《Montauk》）。本剧背景设置在上世纪八十年代的印第安纳州，一个小男孩神秘的消失了；他的朋友、家人以及当地的警方开始竭力找寻答案，但却被卷入了一个充斥秘密试验和恐怖超自然力量的神秘事件中，一个陌生的小女孩看似也与这起事件有莫大的关系。本剧由年轻的类型片电影制作人Matt Duffer和Russ Duffer编剧并执导，由Shawn Levy担任执行制作人。1945年，第二次世界大战结束，日本侵略者也退出了这片被他们蹂躏长达八年之久的古老国度。然而黎民百姓却未盼来久违的和平，国共两党随即展开了新一轮的政权执政。民国初年，九叔带着两个徒弟行医济世，不料却被卷入一场诡异杀人案件中，一口沉入黄河的百年血棺惊现岸边，吉祥镇贪婪大队长贪财好色，为一己私欲，不听村民劝阻私自开启血棺，顿时猫僵出棺，横尸一片。幸亏九叔师徒及时赶到，暂控猫僵。九叔师徒冒雨连夜护送血棺，夜宿客栈，诡异掌柜夫妻，暗藏凶灵，前方暗藏杀机，镇中危机四伏，吉祥镇究竟暗藏了多少不为人知的阴谋？一场正邪大战，一触即发……Industrial Revolution 4.0-Intelligent Era: In the next 10 years, it will enter the Industrial 4.0 Era and realize the transformation from "automation" to "intelligence". Through CPS (Cyber-Physical System) network, real-time connection, mutual identification and effective communication among people, equipment and products are realized, and "personalized" customized commodities are tailored for consumers.