英语词汇“manual relay systemmanual exchange”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	manual relay systemmanual exchange
释义	manual relay systemmanual exchange 学人工转报系统人工交换机；人工中继系统人工电话交换机、电话通信；人工转报系统人工交换机
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