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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.　　杰克·布莱克正洽谈出演新片[墙上有一个钟的房子](The House With A Clock In It’s Walls，暂译)，伊莱·罗斯(《铁杉树丛》)有意加盟执导。该片根据约翰·贝拉斯的同名书籍改编，故事讲述一个10岁的孤儿，在叔叔的老房子里，发现了一个通向神奇惊险世界的隐藏隧道。另外……少船主，我媳妇还在安徽扣着……好说，写好姓名籍贯年龄相貌，我统计过后便去交涉。If CSO's of major banks in the country are asked about distributed denial of service attacks (DDoS) they have encountered in recent months, they will certainly keep their mouths shut. Yes, silence is the first choice for security personnel.Crackle宣布续订Martin Freeman﹑Adam Brody及Edi Gathegi主演《创业公司》第二季。In the growing period of users, there can be measures to increase the frequency of activity, such as from once every 3 days to every day; Users in recession need to be recalled, such as telling him that he has red envelopes waiting for him to receive, or that I still have some gold coins left over and can exchange them for gifts.