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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.第一季能看到主人公们带着高中生的青涩，第二季则是讲成人后的内容，给你看看在分别的7年里，方明绿和侯世因发生了什么事，也会有新的人物出现。《放学后恋爱2》7月26日（星期四）18点Olleh TV初放送武侠大家司马思马重新执笔写作，写出了《刀剑封神录》后，天启的武侠小说《倚天屠龙记》顿时黯然失色。讲述年少时期因为令人伤痛的恶缘而分离的两个男女，在长大后以目中无人的超级甲方topstar和卑躬屈膝又势力的超级乙方纪录片导演再次相遇后刻薄又凄美的爱情故事。 剧中，金宇彬变身俘虏女星芳心的知名歌手，而秀智饰演纪录片的知名制作人，两人儿时结下不解之缘，至长大后再重逢。因银行信贷主管秦晖的醉驾案，刑侦总队副队长李文海受上级指示，到南江市负责调查，此过程中却发现证据的矛头直指刑侦队长郑大为。在兄弟情和真相的矛盾中，李文海选择继续调查。随着调查的深入，李文海发现郑大为与秦晖，及不久前天海集团自杀的张主管有秘密的关联。通过刘洵提供的线索，更是发现了天海集团的众多问题，并将之悉数上报。后上级逐渐查明，不论是郑大为还是天海集团的证据均不成立，李文海这才逐渐意识到自己陷入了一个圈套，他反过来利用齐剑阳安排在他身边的刘洵，最终揭开了齐剑阳为多年前死去的哥哥复仇的秘密。