The circuits can be realized easily and used conveniently and have a wide attenuation range. And the signal attenuation control can be automatized.
这两种电路容易实现，使用简便，具有较大的衰减范围，实现了信号衰减控制自动化。
The circuits can be realized easily and used conveniently and have a wide attenuation range. And the signal attenuation control can be automatized.
这两种电路容易实现，使用简便，具有较大的衰减范围，实现了信号衰减控制自动化。
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