electromagnetic voltmeter的用法和樣例：
例句
- To verify a switch card's specifications, the contact potential can be measured with a sensitive voltmeter.
若需驗證某個開關卡的技術指標，可利用靈敏的伏特計測得其接觸電勢。 - For example, the voltmeter trigger time and measurement time would also be included in the total system time.
例如，系統的總時間中還包括了伏特計的觸發時間和測量時間。
