private branch exchange

US 
UK 
  • un.专用电话小交换机;专用交换分局
  • Web专用小交换机;专用分组交换机;用户电话交换机
un.
1.
专用电话小交换机
2.
专用交换分局

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard