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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.又谆谆叮嘱道：哥哥就当历练去了，没啥好怕的。如果知道这么繁重的工作会让人讨厌的话，就绝对不会成为警察！也未敢惊动家人，悄悄眯了一会眼，一大早就又到书院来了。A4.1. Visual function examination.就算是我们家，小门小户的，那最小的弟妹都难管教些。奈何胡亥矫诏篡位，残害手足，任用赵高这等奸佞小人，倒行逆施，弄的天下乌烟瘴气。