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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.《青春有你2会员升级版》是依托于爱奇艺自制青年励志综艺《青春有你2》，打造的VIP专属衍生节目。节目将通过对内容的深度挖掘，塑造全新视角，为大众呈现主节目未播的训练生们的训练生活及台前幕后的准备过程。一来展现年轻人在追梦道路上不断努力奋斗，实现自我梦想的过程，并传递正能量的年轻人精神；二来记录训练生们的为期4个月的成长蜕变，从而多方面展现她们的成长过程和心路历程。何永强呵呵一笑，但快了。I. TCP Handshake ProtocolManaca's Chinese name is Manaka, which is very directly transliterated by Asasian. When handling Manaka, 500 yen is required as the cost of production, which can be purchased through the ticket vending machine and window staff at the station.We have seen that combining an OrderPizza method with a factory method (that is, the two methods in FactoryPizzaStore) forms a framework. In addition, the factory method encapsulates the production knowledge into each creator subclass, which can also form a framework.通过APP，各种各样的想法交错中，终于迎来了决战之日。3对男女的恋爱走向是？