您要查找的是不是：
- pulse direct current 脉冲直流电
- A device used to convert direct current into alternating current. 反用换流器用于变直流电为交流电的仪器
- pulse direct current(PDC) 脉冲直流电
- Direct Current Governor System M? 直流调速系统?
- Direct Current Plasma Emission Spectrometer DCP M. 直流等离子体发射光谱仪。
- Alternating current,direct current. 交流电，直流电。
- Alternating current, direct current. 直流电，交流电。
- It also wks well under a low direct current. 在直流低电流下使用，很受欢迎。对于管道以及细小部件的焊接，继续焊接及特定数目焊接更具优势。
- It extensive be used for frequent current, direct current, exchange current and pulse in balance circuit. 广泛用于高频、直流、交流和脉衡电路中。
- A device, such as a diode, that converts alternating current to direct current. 整流器; 整流管一种将交流电流转化为直流电流的装置，如二极管
- Nickel is electrochemical micromachininged using nanosecond pulse power,millisecond pulse power and direct current power. 利用纳秒级脉冲电源、毫微秒级脉冲电源和直流电源,进行了电解加工试验。
- Effects of pulse and direct current on the microstructure and the spark erosion resistance of electrochemical deposit layer as EDM tool were investigated. 结果表明，采用脉冲电流可以使电沉积层的某些性能得到改善。
- Direct current cannot use transformers to change voltage. 直流电就不能用变压器来改变电压。
- How Improve The Influence of Direct Current Drive on The LCD? 如何改善直流驱动对液晶显示器的影响?
- A device for converting alternating into direct current. 把交流变为直流的器件。
- A generator, especially one for producing direct current. 发电机发电机，尤指能产生直流电的那种
- 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。
- The system can measure the direct current frequency acceleration. 该系统可以测量频率低至直流的加速度。
- The direct current will cause problems only if you travel upstream. 单向水流只有在你逆流而上时才会造成麻烦。
- Be how much a treadle motorcycle direct current fire maker? 一个踏板摩托直流电打火器多少钱？
