“用户小交换机--专用电话小交换机”概念、定义、翻译-科学时代

单词	用户小交换机--专用电话小交换机
释义	市政工程词汇手册 PBX (private branch exchange) 专用电话小交换机，用户小交换机
随便看	gigantism gigantism gigantism gigantocellular gigantochloa gigantolite gigantomastia Gigantopithecus gigas gigas gigawatt day/ton gigging giggle water gigidress GIGO GIGO (garbage in garbage out) GIGO--GIGO (garbage in garbage out) gigolo gigot gig show gigue gigue GIH GIH--GIH（growth hormone-release inhibiting hormone） GIH（growth hormone-release inhibiting hormone）

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

PBX (private branch exchange)