您要查找的是不是：
- 直流UPSDC UPS
- 便携式仪器仪表用直流UPS的设计Design of the DC UPS for Portable Instruments
- 直流direct current
- 直流电源direct current supply
- 直流电压volts d.c.
- 直流电机DC electric machine
- UPSUninterrupted Power System(UPS)
- 直流稳压电源D.C. regulated power supply
- UPS间UPSroom
- UPS并联UPS parallel-combined
- 直流屏direct current cabinet
- UPS系统UPS system
- UPS变换backward mapping
- 直流电阻DC resistance
- UPS选择choice of UPS
- 直流发电机direct current dynamo
- UPS因素factor
- 直流电动机DC motor
- UPS电源UPS
- 交直流AC/DC
