For convenience in making connections, mount a BNC connector on the outside electrode.

为了连接方便，在外电极上安装一个BNC连接器。

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If a triaxial vacuum feedthrough is unavailable, a metal safety shield should be built around the isolated BNC connection (Figure 4-18).

如果无法找到三同轴的真空接头，那么可以在绝缘的BNC连接处构建金属安全屏蔽(图4 - 18)。

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