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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, A valve seat 7 is arranged between the valve disc 4 and the guide sleeve 6, a packing assembly 9 is arranged between the valve stem 3 and the valve cover 2, an 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 41.20年前著名心理学家欧阳秋和好友兼同事的阮昊天（刘骐饰），前往黎明城一起参与一项秘密的研究项目，但是在研究过程中不知发生了何种变故，最终欧阳秋离奇坠楼而死，好友阮昊天（刘骐饰）也如人间蒸发一般神秘失踪，研究项目随即被叫停。"Base Version"The situation in centos7 is slightly different from that in centos6. Let's first talk about how to save iptables rules in centos6.　　根据介绍，《Emoji大电影》有些像《头脑特工队》和《无敌破坏王》，讲述的是一群表情包在你的手机里的冒险。这群表情包住在“Emoji山谷”里，他们的世界通过手机桌面与其他App的世界相连。　喜欢看蛋疼屌抽搞笑节目的朋友有福了，Ridiculousness是美国MTV电视于2012年4月30日开播的系列搞笑节目，第二季共20集，单集片长20分钟，每集邀请一位嘉宾做客，出糗短片皆来自网络，成本低廉，第一季播出后收视异常火爆，第二季也开播了。既听说了，又不来投，除了亏心，还能有什么缘故？板栗沉默了一下，轻笑道：孙大哥莫要担心。