短語詞組短語secondary alternating voltage 二次交流電壓secondary circuit voltage drop 二次廻路壓降secondary y voltage 副電壓Secondary side voltage 閥側secondary loop voltage drop 二次廻路壓降secondary highest voltage 二次最高電壓secondary available voltage 次級有傚高壓secondary output voltage 次級輸入電壓secondary harmonic voltage 二次諧波電壓 返回 secondary voltage