短语词组短語ac modulation hum 交流調制乾擾hum modulation 噪聲燈;噪聲調制;[電子]哼聲調制hum modulation factor 哼聲調制系數hum modulation degree 哼聲調制度Test Procedure for Hum Modulation 交流聲調制試騐程序 返回 modulation hum