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Reporter: Why are you blushing?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.举世闻名的《富甲山水图》各一半珍藏于大陆和台湾的故宫博物院，这是首次合璧在台北故宫展出。国际上的江湖大盗纷纷闻讯而至。来自大洋彼岸的国际盗宝集团派出两名美女盗贼假扮保安人员混入故宫盗走画卷。盗贼得手之际恰好撞到年轻的保安员小杰（房祖名 饰），双方发生了激烈搏斗。正当身手不凡的小杰终于占了上风要将盗贼擒拿之际，一名正在故宫参观的大陆游客“英雄救美”放走了美女大盗反而制服了小杰。当身穿便服的小杰终于让对方相信了自己是保安人员，美女才是盗贼的时候，这名游客追悔莫及。原来这名叫大海（夏雨 饰）的游客是一名来自北京的小区保安。与此同时，比误放盗贼更“乌龙”的事情发生了，小杰被保安总部认为是盗窃集团的内应，大海则发现旅行团的大巴早已消失，自己“脱团”了。小杰不仅要躲避警方的追捕而且必须要亲自找回画卷才能证明自己的清白；举目无亲的大海也“被成为”了小杰的“同谋”，他则是要找到他的旅行团才能证明自己的身份。于是，来自两岸的两名“屌丝”保安开始了在宝岛“亡命天涯”的旅程......Football出生于传统裁缝世家的哈蕾从小梦想成为芭蕾舞者，可缺少天赋的她被周围的人认定是“飞不起来的丑小鸭”。机缘巧合哈蕾成了联涟娱乐的练习生，与刚出道的偶像男团M.Y.同属一家公司。完成没有街舞功底的哈蕾，为了追求自己的舞蹈梦想，不停的拼命练习，被一向倔强自大的男团队长赫连荣光看在眼里，决定帮助这个“丑小鸭”。荣光有着惊人的舞蹈天赋，人人都羡慕他“天生的”才华，却不知其实他过目不忘的舞技是因为大脑中被迫植入的一个芯片。这枚儿时被植入的芯片有个致命BUG，每十年需要重启一次，同时会抹除这十年间的所有记忆。明知自己会忘记，是否还要去爱？Review the correct practice method: