公共交换电话网
public switched telephone networks
PSTN
公共交换电话网路
public switched telephone network
PSTN
串接交换交换
tandem switching exchange
强奇异交换交换子代数
strongly singular maximal abelian self-adjoint sub
共电电话机
common battary telephone set
telephone set
common battary
交换共享平台
exchange and sharing Platform
信息公共交换平台
information exchanged platform
医疗数据交换共享
Medical imaging exchange and sharing
Na(+)/Ca(2+)交换电流
Sodium-calcium exchange currents
本地交换电信公司
LEC Local Exchange Carrier
地面航空无线电交换机
ground aviation radio exchange