电信计费系统的设计
Design of telecommunications billing system
移动通信计费系统
mobile communications tolling systems
长途电话计费系统
toll message accounting system
磁层-电离层系统(MI系统)
Magmetosphere-Ionosphere(MI) system
电力牵引供电系统电源
power supply from electric traction feeding system
电量计费系统
ammonium hydrosulfate
Energy metering system
electric energy billing system
电量实时统计系统
active power real time statistic system
电能计费系统
Energy metering system
electricity metering system
电能量计量计费系统
power energy billing system
telemeter reading system
the System of Measuring and Billing of Power Energy
tele meter reading system
电系统电压变动
electrical system voltage variation
电信统计
telecommunication statistics
电信系统
telecommunication systems
telecom systems
telecommunications system
Telecommunication system
TCS