1.
universal test armature
交直流电通用试验机
2.
an alternating [a direct] current dynamo
交流 [直流] 发电机
3.
convert (alternating current)to direct current
将（交流电）变成直流电;
4.
DC motor converter set
交流-直流电动变流器组
5.
combined a.c. and d.c. welding power source
交直流两用弧焊电源
6.
AC & DC wet-type electromagnet for valve
交直流湿式阀用电磁铁
7.
AC-DC digital voltage meter
交直流两用数字电压表
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.
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。
12.
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。
13.
circuit design, wiring diagrams, schematics, AC/DC sources
电路设计, 接线图, 示意图, 交流/直流电源
14.
supply meter for direct or alternating current
直流或交流电供应电度表
15.
Automatic exchange for DC and AC supply.
直流电源与交流供电能自动转换。
16.
a synchronous machine that converts alternating to direct current or vice versa.
直流电和交流电同步转换的机器。
17.
How to Turn an AC Induction Motor into a DC Motor
如何将交流感应电机转变为直流电机
18.
"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。