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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, The O-ring 10 is further arranged at 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, 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, and the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity.然而努尔哈赤只用了一招便让明军的部署灰飞烟灭。就此永定门亦然告破，大量徽王府军士涌入，并不急着追击，只护重炮入城。THE K2描绘的是的热烈的爱着国家与同僚却被他们抛弃的警卫员，与连爱情都能作为复仇工具使用的有力大选候选人隐藏着的女儿之间的故事。这里还勾画了准第一夫人隐藏的欲望的故事。天楚国本该姓楚，一场宫闱巨变致使帝后遇难，国家陷入风雨飘摇，国师风如歌当机立断独掌朝纲，十五年来，日渐成年的太子有心夺回失去的一切，奈何天楚已是风党天下……老支书刘茂福即将退休，支部书记的人选成为众村民及乡村干部关注的焦点。经过村干部米粮、曲元宝等人明争暗斗之后，当选的竟然是一位农家妇女—谷雨。众人惊讶之余，也不免为她担忧：“女人不压茬，母鸡不打鸣”，一个女人当村长，行么？谷雨的想法很简单，她就是要解决周边农民卖粮难问题。她虚心接受了“知识分子”夏诗朋的意见，学着“用工业思维考虑农业问题”。她决定办工厂，搞玉米深加工。谷雨以村里一片树林作抵押向银行贷款，办起了柠檬酸厂。但这片树林是鸡鸣甸的“家底儿”，是刘茂福等一些老人的精神家园。伴随着试车失败、产品滞销、事故频发等一系列问题的出现，村民们对谷雨从不理解发展到了行为抵触。婚姻面临崩溃，工厂命悬一线，村民又不理解，谷雨在多重压力下苦苦坚持着。然而，坚强的谷雨还是挺过来了，柠檬酸厂的生产与营销渐渐步入正轨，谷雨又有了进一步发展的大计划……