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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.武侠小说市场低迷，武侠名家停笔，天启把握住了时机，经过炒作、运气才得以成功……天启不断炒作，不断引导舆论，才得到诸多头衔、荣誉……天启的聪颖程度远远不如方仲永，但是卖弄程度却远远超过方仲永……到底有多厚颜无耻，才能说出这样一段话？。正争执不下的时候，忽然砰的一声，箱子盖被掀开了，一个十二三岁的少年探头露了出来。天叔、贼仔、头皮、阿邦、阿华五个警察属同一小组，五人工作上配合默契，屡建奇功，被称为“金牌五虎将”。IT is the abbreviation of Information Technology, which means "information technology" and includes modern computer, network, communication and other information technologies. The widespread application of IT is a sign of entering the information society.1993年埼玉县爱犬家发生4人相继失踪事件。两年后警方逮捕了经营宠物店的一对男女。被逮捕的是关根元（卒）和风间博子。通过“把身体变得透明”将被害者的尸体肢解并遗弃以达到消灭证据的目的。由于作案手法残忍，该案件成为当时震惊全日本的“琦玉爱犬家连续杀人事件”。在本案中被逮捕的两人于2009年被判处死刑，然而由于当事人证言的矛盾，该案的全貌仍未为世人所知。