PABX:专用自动交换分机(Private Automatic Branch Exchange) 数据包装拆器交换(PAD Switching)
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无线专用自动交换分机 WPABX Wireless Private Automatic Branch Exchange
专用自动交换分机前缀 pabx prefix
专用自动分机交换 private automatic branch exchange ; exchange, private automatic branch
专用自动分组交换机 private automatic branch exchange ; PABX
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