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V-grooves must be opened between the splicing boards. The V-grooves should be opened from both sides of the PCB. Under normal circumstances, the V-grooves should be opened by 1/3 on both sides of the PCB, i.e. If the thickness of the board is 1.6 mm, the depth of the V-grooves on both sides of the board should be 0.53 mm;;比如。秋丛绕舍似陶家，遍绕篱边日渐斜。然后，花生便问守门的老军，这黑少年来干什么。挂上手机，陈启走到秋韵茶馆，订了一个单间。Large traffic attacks saturate the bandwidth and infrastructure of the network through massive traffic and consume them completely, thus realizing the purpose of flooding the network. Once the traffic exceeds the capacity of the network or the ability of the network to connect to other parts of the Internet, the network will not be accessible, as shown in the above figure. Examples of heavy traffic attacks include ICMP, fragmentation, and UDP floods.Telecommunications