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2. The new operator is omitted, the usage frequency of system memory is reduced, and the GC pressure is reduced.A packing assembly 9 is arranged between the valve stem 3 and the valve cover 2, the O-ring 10 is further arranged on 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, and the contact end of the valve disc 4 and the valve seat 7 is provided with a water grain surface 41. The arcuate end face 12 forms a line seal between the sealing surface of the valve body 1 and the valve seat 7. The water grain 41 can ensure the sealing performance of the valve seat 7 and the valve disc 4.电视剧《狼殿下》，讲述了后梁奎州城郡主摘星与生长于狼群中的少年狼仔相识，错别八年后相遇，狼仔已成狠厉的渤王，两人需在复仇、危机中为爱力战天命的故事。《浮沉》根据同名网络小说改编，除了外企的销售之争，更有大型国企在改制进程中遭遇的种种现实困惑，覆盖了职场各层次人群的生存状态。　　故事讲述成为了罪犯的哥哥葛城勇吾以及成为了警视厅搜查一课刑警的弟弟圭吾。弟弟因在杀人未遂事件中被测出了与嫌疑人的DNA跟自己完全一样而遭到逮捕。此时他想起了在20年前因被诱拐而下落不明的双胞胎哥哥。啊……陈启几乎被吓了一跳。一年进行一次自行车自助旅行的永宇和哥哥永哲，一同到济洲岛环岛旅行，不料中途遇到雷阵雨只好到一处别墅躲雨，并在此与曹敬雯相遇，永宇对敬雯留下深刻印象，一年后永宇，永哲和青梅竹马的真莹一起前往济州岛旅行，永宇起个大早准备坐游艇出海却在此再次巧遇敬雯二人在小岛度过了短暂而愉快的时光,永宇发现自己对敬雯发好感，因此临走时永宇轻吻敬雯手背，并留下电话号码永宇为了发挥留学德国时的专长，而进入好友真莹所任职的企业形象顾问公司，并第三度与敬雯重遇