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那可不，刚刚侄媳都给我讲了。林朝曦还是觉得奇怪，但依然说不出哪里不对。6. Internet access rate: To ensure stable Internet connection, the lowest connection rate is above 56kbps (using Modem dialing), and above 512kbps (using ADSL or broadband access) is recommended.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.嗯，一定。