Bring it to the foreground and provide a line of input followed by Ctrl-d to signal end of input file.
将该命令列表放到前台，添加一行输入，最后按下Ctrl - d表示输入文件的结尾。
The input signal is applied to a proprietary programmable gain front end based around an analog modulator.
输入信号作用于一个以模拟调制器为基础的专有可编程增益前端。
The magnetic induction head is electrically connected with the input end of the magnetic signal amplifying test display;
磁信号放大检验显示器由小功率双运放大器耦合一个检验显示开关电路而成；
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