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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, The O-ring 10 is further arranged at 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, 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, and the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity.可事实上呢？项羽带着三万骑兵杀回来的时候，刘邦才发现大事不妙。Zhao Mucheng finished, silent.4. Javascript version of the policy pattern　Netflix喜剧剧集《非典型少年》将完结，该剧宣布续订第4季，也是最后一季，和Sam开始最后一次探险。最终季有10集，将于明年上线。RJ1, …Female workers during pregnancy and lactation also have the right to refuse to engage in operations where the concentration of toxic substances exceeds the national occupational health standards. (Original title: The state clearly stipulates that women will have half a day off on March 8 every year, but you don't know about these things yet...)