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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, 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.MDT team sets up its own speech system;民国早期，蒋介石和李宗仁是两大死对头，但后来由于形势发展需要，他们走向联合，在国共内越后期，李宗仁被蒋介石推上代总统的宝座，成了蒋介石的挡箭牌。1949年4月，国共和谈破裂。4月21日中国人民解放军发动渡江战役，势如破竹，国军溃不成军，代总统李宗仁不甘再做蒋介石的挡箭牌，回到广西决定重整桂系军队，割据一方。该剧讲述的就是这个时期国民党中统局特务与桂系之间的一场内部战争。Priew是个又帅又多金的男人，虽然家财万贯，但并非出身于上流社会。为此，Priew尚算完美，唯一的缺点就是生性风流。但是虽然沉沦欲海，他也从不勉强任何人，他的人生信条是“对方要什么就给什么”！情节逆转是因为出现一个乡土气息绝对浓厚的女人Namunan,Namunan是Priew公司的员工，却不幸亲眼目睹Priew和自己的亲戚亲热，这令她对Priew十分反感而离开公司。高桥一生、斋藤工、泷藤贤一将主演新剧集《东京单身男子》(東京独身男子，暂译)，剧集故事围绕银行职员(高桥一生饰)、美容牙科诊所院长(斋藤工饰)与律师事务所老板(泷藤贤一饰)三名单身男子展开。金子亚里纱([中学圣日记])担任编剧。该剧将于今年4月开播。222. X.X.121Telecommunications