... common winding || 公用绕组 common-battery telephone switchboard || 共电电话交换机 common-channel || 共信道 ...
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local battery telephone switchboard 磁石式电话交换机
common-battery telephone switchboard 共电电话交换机
common - battery telephone switchboard 共电电话交换机
common battery telephone switchboard [通信] 共电制电话交换机
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