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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, The O-ring 10 is further arranged at the upper part 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, and the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity.　　《家族荣耀》以姐妹花甄芯（杨茜尧饰）和贾洛仪（李彩桦饰）同一天嫁入百年财阀马氏家族的世纪婚礼为线索，讲述了马家三代人之间跌宕起伏、休戚与共的家族故事L PM2.5 dust, toxic smoke and water sources生性浪漫的夏拙（李易峰 饰），火二代欧阳俊（陈星旭 饰），老区美男子林安邦（段博文 饰），邋遢大王易子梦（董春辉 饰）是同一所大学、同一个宿舍的四名室友，带着各自不同的目的，成为了一名火箭军的大学生士兵。当他们第一眼看到深藏在大兴安岭深处的部队时，萌生了悔意。在未来的日子里，夏拙等人也逐渐意识到，在火箭军，只有十年以上的兵，才有资格叫兵。二十年以上的兵，才有资格叫老兵。二十五年以上的，统称为“窖藏”。面对着身怀各式绝技、不同年份的“陈年老兵”，新生力量的萌动与越陈越香的老兵，产生了不可避免的对抗。在梦想与现实极大的落差和老兵们的传帮带下，他们用青春逐渐读懂了“军人”二字，担起了“大国底牌”的威严。公元1806年，英格兰在抗击拿破仑的持久战中八面受敌，实践派魔法师早在几百年前就已销声匿迹。然而，研究过往光辉历史的学者们发现，尚有一位实践派魔法师——诺瑞尔先生在世。此人深居简出，然略显身手，举国上下无不 为之惊叹。移居伦敦后，他唤美妇人起死回生，召幻影舰队威慑法寇。他一贯瞻前顾后、小题大做，怎奈后生可畏——乔纳森•斯特兰奇初出茅庐，已崭露头角。该生风华正茂、一表人才、意气风发，方方面面与诺瑞尔截然相反。自此，两位伟大的魔法师之间斗争不断、险象环生，比起英法两国之战有过之而无不及。二人各怀执念，暗中更染指黑魔法，哪知一切实为作茧自缚，前途凶险难料The next article: Intelligent Construction Process Management of Large Marine Engineering Projects Based on BIM Technology