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词汇 pbx
释义 PBX
noun[ C ]
ukus
COMMUNICATIONS
abbreviation for private branch exchange: a phone system for managing calls between different phone numbers in a particular business or office, and for calls to and from numbers outside the business:
The PBX systems are expensive and require maintenance if a new line is needed or even if an employee is moving to a new desk but wants to keep his old extension.
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