英语词汇“open contact tone”的读音、翻译、释义、用法及例句-语文网

词汇	open contact tone
释义	open contact tone 触点打开音响指示在电话中，一种指示触点打开的音响信号。
随便看	systematism systematist systematization systematize systematizer systematology system authentication key system building system bus system chart system check system clock system command system communication system communication table system configuration system console system constants system contents directory system control area system control block system control facility system control file system controller system control programming

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