1k色母与2k色母的区别

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.下更五点。Increase the Maximum Half Connections待到五月中，这样的事情又出现了两次，双方一炮未开，有惊无险。《德云社郭德纲从艺30周年北展开幕站 2019》是郭德纲从艺三十周年系列专场演出开幕式。郭德纲派出了德云社最强阵容，六城联动，一场说走就走的德云社大型巡演正式震撼开启！项羽续道：到时候，我们大军驻扎彭城到盱眙一线，对英布和南方的尹旭都是一个镇守。