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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.杀敌七名，寸功未得。“哦耶！这简直太给力呐！”轮胎心中一定这样想到。于是，它滚着矫健的步伐，向前方走去，一路上掀起血雨腥风。而那群完全没有头脑的观着，始终注视着这离奇的一切……从表面上看，基蒂、玛戈特、布里和奥利维亚似乎没有什么共同之处，但有一种激情将他们团结在一起——揭露不公正。 他们组成自己的秘密社会，DGM - 他们不发疯，他们得到甚至 - 玩匿名恶作剧，以揭露欺凌。 但是，当他们的最新目标，罗尼，最终死了，手里拿着一张DGM卡，女孩们意识到她们不像她们想象的那么匿名——现在有人想要报复。 班纳曼学校从外面看起来可能很漂亮，但表面之下有些东西很腐败。竞争被鼓励到残酷点，欺凌是普遍和接受的机构;老师看的，如果你不能接受它，你不适合学校。 这四个女孩开始为那些在学校受委屈的人伸张正义，但是这些女孩却遭到反对。 DGM 发现自己被陷害了自己没有犯下的罪行。他们唯一的选择是找出谁是真正的凶手，为什么他们被陷害，并一劳永逸地澄清他们的名字。 对于基蒂、玛戈特、布里和奥利维亚来说，这也是一个初恋、考试和身份危机的时候。爱情与关系、信任、真正的友谊、赋权、青少年身份和独立的主题在整个系列中令人上瘾。即使他们专注于成绩或球员，危险也永远不会遥远何心隐闻言大喜击掌：好个大道至简，虽是白话，却尽是此理，古今能将祖师四字真言诠释如此直白，老少皆知，唯船主一人矣。Memory startup!1.0-3.0