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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, A valve seat 7 is arranged between the valve disc 4 and the guide sleeve 6, a packing assembly 9 is arranged between the valve stem 3 and the valve cover 2, an 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.正义与邪恶相互碰撞的世界有人暗中战斗。之前，斗战胜佛转世成为大唐皇子，天降轩辕剑，气势如虹，准备一举登上人皇之位。本剧叙述在野党影子内阁成员Jim Hacker在帮助本党大选获胜之后得到行政事务部（DAA）部长的职务，从此开始面对以部秘书Sir Humphrey Appleby为首的公务员体系，而他的公派私人秘书、同属公务员的Bernard则夹在了当中。在Hacker所代表的政客以及Appleby所代表的公务员之间因施政而发生的种种冲突之中，两人的关系不停地发生变化，既有互相捂盖子，也有互相揭老底。与此同时，英国政治体制（包括政党体制和公务员体制）中的种种不为外人所知弊端和黑幕也展现在观众眼前。当然所有这些都是通过大量喜剧情节和台词展开。在本系列后半部分的《Yes Prime Minister》中，Hacker通过党内角力当上了首相，而Appleby也已先他一步当上了首相秘书，两人的故事移到唐宁街10号继续展开。不仅没来，连口信也没一个Montenegro: 30,000