extra low voltage

• 超低电压

extra low voltage的用法和样例：

例句

1. Also, lower voltage taps are usually provided for idling and slow heatups.
   通常在机器空转或者缓慢加热时用到低电压插孔。
2. A nanovoltmeter is a sensitive voltmeter optimized to measure very low voltages.
   纳伏表是专门适合测量非常低电压的电压表。