In many applications a fluctuating DC current is undesirable.
在许多应用场合,波动的直流电是讨厌的.
Either direct or alternating current may be used for driving electric trains.
直流电和交流电都可用来驱动电气火车.
If the electric field added is unchangeable, what produces is the direct current.
如果所加的电场不变, 产生的是直流电.
A device used to convert current into alternating current.
反用换流器用于变直流电为交流电的仪器.
A. C . can be changed into D, C . or vice versa.
交流电能变成直流电, 反过来直流电也能变成交流电.
A current is a current flowing always in the same direction.
直流电是一种总是沿同一标的目的流动的电流.
The rectified current is then directed to the electronic motors.
变成的直流电直接进入电动机.
A rectifier is a device which changes AC to DC.
整流器是一种将交流电转变为直流电的装置.
The units are available for either alternating or direct current.
这些装置既可以用交流电,或可以用直流电.
Currents from electric batteries are called direct current.
来自电池的电流称为直流电.
What does DC mean? DC means direct current.
直流)意味着什么? DC就是直流电.
These furnaces may operate on AC or DC.
电炉可以采用交流电或直流电.
Coil voltage 24 V DC.
线圈电压24伏直流电.
Direct current cannot use transformers to change voltage.
直流电就不能用变压器来改变电压.
DC means direct current.
DC就是直流电.