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How to proceed: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.最后一谋，最后两个字敲打在人心头，让人分外难受。…,表面看似镇定从容，但是实际上在龙且心里。板栗看了那帖子，原来是拜帖，有镇南候顾家的，有汪家的，还有廉郡王府上，还有孔雀王府上的……他收了笑容，问道：都是要来拜会奶奶和娘的？郑氏淡然道：应该说，都是冲着你来的。当梁宇方决意不出席酒店十周年庆酒会的时候，他的父亲，也是酒店董事长的梁泽，以及当总经理的姊姊梁宇青，正殷殷期盼著能够在这个酒会上正式将他介绍出来。只是当宇方在好友阿泰帮助下正要逃离酒店的时候，却逃不了命运布下的爱情红线。陪著好友杜允儿来到酒店接演唱case的向天微，两人仓皇找著宴会厅，却也因为一时匆忙，天微因此和宇方撞在一块，当场摔得狼狈不堪。天微个性强悍，宇方自觉无辜，一言不合，两人斗嘴起来，却不知这正是命运的安排、爱情的开始。当下，媳妇们摆上饭来，分里外两拨。