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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.The rear suspension of the new BMW 3 Series is relatively complicated, adopting a five-link structure, which is not much different from that of the previous generation BMW 3 Series in structure, but has been optimized in the structure of the link. The lower swing arm of the five-link independent rear suspension is very thick, and most of the impact of the ground face suspension is transmitted from the lower swing arm to the shock absorbing spring. In addition to controlling the swing track of the wheels, the lower swing arm and the lower rear control arm also have the function of adjusting the toe-in and camber angle of the wheels.忠孝节义四个单元主题，分别为：忠─万古留芳；孝─孝感动天；节─断机教子；义─路遥知马力。郑武向那姑娘露出一个憨厚的笑容。一名记者想以自己的文笔缅怀他去世的父亲。为寻找写作灵感，他开始了一段为期四天的列车之列。在这段旅程中，他遇到了形形色色的人，并借此机会重拾旧爱。-Excerpt from the enthusiastic and explosive discussion of teammates after a pleasant team formation.一个茶杯砸到地下，杯子的碎片四散，里面的茶水溅洒一地。