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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, 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.开往深圳的列车上，平凡的湖南女孩谭妙妙遇见了渴望过上好日子的余宛棠，两人成为了好朋友，开始了深圳的逐梦之旅。妙妙刚到深圳，就因为在酒店帮忙被误认为是船王的千金，邂逅了黄丽凤的儿子永固建设的总经理朱新宇……真实全景呈现8位高学历求职者在金融公司为期一个月的实习生活，目标是争夺3个转正名额。8名实习生会有顶尖商业BOSS亲自带教，6位成长见证官在观察室里进行实时点评，第二季将会增大任务难度、加强淘汰赛制、并开启全新的开启师徒大战！可惜，无关情感，关乎智慧和勇气，关乎生死。9Open the "Learning Power" client. On the welcome page, it is "It's a pleasure to learn while learning" from the Analects of Confucius. To use this client, you need to register your mobile phone number. After registration, it enters the main page. From the content point of view, it consists of 38 channels in the two major sections of "Learning" and "Video Learning". Among them, the "learning" section includes channels such as recommendation, news, new ideas, current politics synthesis, publication, practice, subscription, economy, figures, science and technology, culture, pictures, party history, personnel, law and discipline, international, 19 major time, documentary, allusions, current reviews, thinking, military, etc.