会話トレ Drill: 電気工学 Electrical engineering, Mathematics

赤外線

infrared rays

IR

虚数 (きょすう)

imaginary number

an imaginary number

電圧計

voltmeter

説明：ある2点間の電位差を測る電気計器。
A voltmeter is an electrical meter that measures the voltage difference between two points

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