公共电话交换网
public switched telephone network
PSTN Public switched telephone network
PSTN
公共电话网
public switched tele-phone network
PSTN
公共电网
public power system
public grid
public electricity grid
public power supply network
共电半自动制
common battery semi-automatic system
common-battery semiautomatic system
共电沉积
Electrodepodition
coelectrodeposition
codeposition
composite electrodepostion
Co-electrodeposition
共电电话机
common battary telephone set
telephone set
common battary
共电极双通道
dual-channels and com-electrode
共电交换台
common-battery switchboard