GSM900通信系统
GSM900 mobile communication system
DS-SS通信系统
DSSS communication system
Proxy-Users通信系统
server-proxy communication system
CDMA通信系统
CDMA communication system
标准通信系统
communications systems
standard communications systems
communications systems， standard
Standard
城市通信系统
urban communication system
单元通信系统
cellular communication system
测井通信系统
logging communication system
便携通信系统
portable communication system
船载通信系统
shipboard communication system
调度通信系统
dispatching and communication system
dispatch communication system
dispatching communications system
Dispatching communication system