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.The skill of collapsing dragon legs is very exotic. The author is an action mode, so it is difficult to aim at this skill when used. Let's divide it into people.这一切，只为了那被99.9%的有罪率所掩盖下的0.1%的真相……动画片《小飞狗环球旅行记》讲述一只聪明的小狗和朋友环游世界的故事，该动画片搞笑、幽默、寓教于乐，更多精彩动画片请关注CNTV动画台！Log.info ("% # x= >% s"% (address, (data or ''). Encode ('hex ')) 本片荣获1983年青年艺术家奖最佳动作片奖。
