欧美日韩在线第一页

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.杨长帆站在舰首，终于迎来了最后的冲锋。说完，见娘似笑非笑地瞅她，忙道：他自己也这么说的，让我瞪大眼睛看清楚、想清楚再决定呢。Public void setParent (TreeNode parent) {中文系毕业的高材生蓝卓为了自己做家教时的一个承诺，陪上了自己的青春、理想和世人眼中的幸福，失去了最爱的女友，用自己最好的十年时光，悉心照顾一个被母亲遗弃的小女孩，直到女孩长大。蓝卓为了女孩的前途，瞒着亲人、朋友，隐瞒自己的病情，独自一人前往边疆支教。十几年间，蓝卓经历了情感丢失、结婚离婚、爱人离世等一系列的生离死别的痛苦，最终把女孩培养成人，但他却看不到女孩的幸福生活，因为，多年的积劳使他的双目失明。女孩最终没有和亲生妈妈去美国，留了下来，现在她要照顾这个她生命中最重要的人。朕谈不上烦恼，只是不愿被琐事纠缠。对此，魏王豹觉得太过出乎意料。