只需要如下图在网络预置窗口里点击左下方的+号按钮添加USB连接。
To do this, just add a connection by clicking the plus sign at the bottom left of the Network Preferences window.
一个按钮简单和6预置程序！
电磁电路和时间预置电路平行设置，两者通过打击按钮相连。
The electromagnetic circuit and the time presetting circuit are arranged in parallel and connected by the hitting button.
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