1.
convert (alternating current)to direct current
将（交流电）变成直流电;
2.
AC clip-on voltammeter
钳形交流电压电流表
3.
AC voltage electromagnetic relay
交流电压电磁继电器
4.
single-speed alternating current electric drive
单速交流电电力驱动
5.
AC moving iron rectangular instrument
交流电磁系矩形电表
6.
A.C. motor capacitors
GB3667-1997交流电动机电容器
7.
low frequency AC coded track circuit
低频交流电码轨道电路
8.
AC current or voltage source. DC offset can be specified.
交流电流源或电压源。可指定直流偏移。
9.
To convert(alternating current)into direct current.
把…整流将（交流电）转化为直流电
10.
"The AC output must therefore be rectified, or changed to dc."
所以交流电必须整流为直流电。
11.
Conversion of alternating to unidirectional current.
整流交流电转变到单向电流
12.
converts alternating current into direct current or vice versa.
变交流电为直流电或者变直流电为交流电的装置。
13.
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。
14.
"Alternating current (AC): Flow of electric charge that reverses periodically, unlike direct current."
交流电:周期性换向的电流,和直流电不一样。
15.
microcomputer alternating current resistivity instrument
微机化交流电阻率仪器
16.
harmonic content of an a.c.power supply
交流电源的谐波含量
17.
an alternating [a direct] current dynamo
交流 [直流] 发电机
18.
DC motor converter set
交流-直流电动变流器组