direct current-direct current DC-DC converter
direct-current direct-current converter
alternating current-direct current
asymmetric alternating current-direct current powe
asymmetric alternating current-direct current power supply
Direct current governor
Earth Judgment of Direct Current System
multi-infeed direct current system
polar direct current system
The Computer Monitoring of Direct Current System
alternating current governor system
1 000 kV ultra-high voltage direct current
3-D direct current survey
救护飞机(Airam bulances)
三维直流电法
accumulator direct current supply
activating tungsten inert-gas welding with direct current straight polarity mode
alternating and direct current desalting
alternating current AC-direct current DC-AC