process of superimposed direct current on alternating current
Related Translations:
重叠: 1.(一层层堆积) one on top of another; overlapping 短语和例子山峦重叠 range upon range of mountains; 精简重叠的行政机构 simplify overlapping administrative organizations; 消灭人事重叠和其他浪费现象 eliminate personnel duplica