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5. At the same time, press and hold the volume reduction key on the left side of the mobile phone;一名年轻的网络黑客尼奥发现看似正常的现实世界实际上是由一个名为“矩阵”的计算机人工智能系统控制的，人们就象他放牧的动物一样。尼奥在网络上查找关于“矩阵”的一切。在一名神秘女郎特蕾妮的引导下见到了黑客组织的首领摩菲斯，三人一起走上了抗争“矩阵”的征途。短暂的一天里，许多人的命运发生翻天覆地的改变……A packing assembly 9 is arranged between the valve stem 3 and the valve cover 2, the 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. The arcuate end face 12 forms a line seal between the sealing surface of the valve body 1 and the valve seat 7. The water grain 41 can ensure the sealing performance of the valve seat 7 and the valve disc 4.看着龙纹玉坠，一脸沉思。Source1.method2 ();