资料来源 : pyDict

电压表

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Voltmeter \Volt"me`ter\, n. [2d volt + -meter.] (elec.)
   An instrument for measuring in volts the differences of
   potential between different points of an electrical circuit.

资料来源 : WordNet®

voltmeter
     n : meter that measures the potential difference between two
         points