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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, 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, the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity, and the two O-rings 10 are respectively arranged on the inner side and the outer side of the packing gland 11.Event_name: The name of the event created (uniquely determined).Charming Vietnam 20171108 Episode 22, with good moral cultivation, good conduct, no bad behavior record.Figure 25 Changes in the Number of Cross-domain Forgery Traffic Attacks in Provinces in Recent Two Months攻略过程中，本想专注任务无心开启爱情线的司妍意外邂逅了冷面腹黑亓官仪、忠犬事业粉人工智能管家杰克、天降官配“伪男主”亓官保、风流倜傥亓官修、冷面侍卫云离、直男铁憨憨亓官达等众多美男少主角色，从而发生了一系列高能甜宠的浪漫成长故事。