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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.公安边防缉毒大剧《铁血雄心》以“发扬传统，坚定信念，执法为民，践行军人核心价值观”主题，以公安边防部队国际合作打击跨国贩毒的多起大案为素材，以国务院、中央军委授予“缉毒先锋站”荣誉称号的云南公安边防总队木康公安检查站为原型，讲述了公安边防官兵在禁毒人民战争勇当先锋的故事。　　Jack Reacher在小说中曾经是美国陆军的军警，离开美军后他以调查员身份接手调查一些可疑或有危险性的案件。According to the above description, the proxy mode is relatively easy to understand. Let's look at the code:Public String getSubject ();司马玉龙自复国之后，因念念不忘失踪的太后，化名为楚天佑，在忠义侯赵羽和红颜知己珊珊以及精通医术，为人善良逗趣的丁五味的陪同下，一路边找寻太后，边铲除前朝余孽及贪官污吏，平复了许多人世间的泣血奇冤，深得百姓爱戴。本剧共四个单元:1、绣球奇案 2、鬼新娘 3、真假国主 4、糊涂县令妙钦差。他们这么做为的就是将军落单，没了臂助救援，再加害与您。