telephone outside connections
telephone outside connections
电话外线连接
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The testing instrument of telephone outside connections is a set of instruments for examining and testing telephones and feed lines by telephone exchange station opera-tors.
电话外线测试仪，是电话交换台对用户话机、馈线进行检查、测试的配套仪器。
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