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In order to reach a rich level of green coloring,好的。Chapter 4A 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.故事涵盖了反恐、党争两个非常有想象空间的主题。同时，作者的巧妙之处在于，全篇运用了典型的美剧剧作结构与人物关系设定，并且把故事嵌套在当时的世界中心大唐都城长安这样一个完美的时空切入点。其跌宕紧凑的故事架构、反脸谱化的英雄人物、云波诡异的深宫权斗、脑洞大开的细节设计，都是 具备较大开发潜力的黄金元素。你是想回房间继续睡觉？吕馨说道。什么？王二河顿时一惊。