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A packing assembly 9 is arranged between the valve stem 3 and the valve cover 2, the O-ring 10 is further arranged on the upper part 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, and the contact end of the valve disc 4 and the valve seat 7 is provided with a water grain surface 41. The arcuate end face 12 forms a line seal between the sealing surface of the valve body 1 and the valve seat 7. The water grain 41 can ensure the sealing performance of the valve seat 7 and the valve disc 4.不为其他，只为心里舒坦。跻身富豪行列的沈茉年一家受不了贫穷，丈夫留下一张出去挣钱的纸条后消失。沈茉年千辛万苦把王基百、二百、三百三兄弟拉扯大。７年后丈夫现身，捲走了她辛苦攒下的钱后又销声匿迹，同时使她怀上了四儿子四百。普通柔弱女子可能因此轻生，把希望寄托到来世，但我们的茉年女士，勒紧腰带，顽强地抚养着孩子。或许她的精诚感动了苍天，新城市开发导致的地价飙升给她带来了意外的曙光。当初的愿望只不过是让孩子们有肉吃，但随着用一分一分攒下的钱购置的养猪场摊上土地开发的好事儿，“世宗大王”、“李舜臣将军”等带着他们代言的钞票等不停地前往沈茉年家中，终于家里放眼所及都是钞票。突然跻身富豪行列，心满意足的同时也意识到自己身上还贴着暴富的标签，为了彻底融入上流社会，茉年收购了GRACE酒店。提升人生档次？无法阻挡的婚姻之芽？挂掉电话后，庄谢更加迷惑了，这一个个都是怎么了？就算爱丽丝发个自拍的脱.衣舞视频，那又如何？不至于一个个都打电话来推荐？带着好奇，庄谢打开电脑。Public Object next () {Prototype is the prototype.