10kV standby power supply automatic switching device
automatic data switching system
automatic switching
自动切换
自动投切
自动转换
自动交换
自动开关
自动倒换
自投
automatic switching in undervoltage
automatic system
自动化系统
自动系统
自动测试系统
自动化控制
综合自动化系统
自治系统
白动化系统
Automatic system design
Automatic System for Hydrological Data Acquisition and Transmission
automatic system for office
automatic system of hydrologic data collection and transmission
Automatic System of Hydrological Data Acquisition
Automatic System of Hydrological Data Acquisition and Transmission
automatic telephone room
board of substation automatic system
Building Automatic System
Integrated automatic system
Integrated Automatic System of Transformation Station
remote automatic system
Synthetical automatic system
the Vehicle Automatic System