carrier system telephone
open wire carrier telephone system
transistorized 60-channel balanced cable carrier telephone system
Charging windows of telephone subscriber
digital loop subscriber carrier
optical communication system， subscriber loop
Optical Communication System，Subscriber Loop
subscriber carrier terminal
TS Telephone Subscriber
barge carrier system or barge carrying ship
broadband carrier system
carrier carrier interaction
Carrier system
载波通信系统
输导系统
输导体系
载波系统
载波制
载波制电话
carrier telephone channel
carrier telephone circuit