Electrical equipment. Digital ammeter (left, yellow), digital voltmeter (right, yellow) and an oscilloscope. An ammeter measures the number of amperes (electric current) in a circuit. A voltmeter measures voltage (electrical force) in a circuit. An oscilloscope uses a cathode ray tube to graphically exhibit variations in voltage or current.

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TOP10231887

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達志影像

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RM

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須由TPG 完整授權

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