In this video: Westinghouse DC Voltmeter Type PX-5 and AC Wattmeter Type PY-5.
Next Video: Weston AC Voltmeter Model 904 and Sensitive Research Instrument Co. DC Microammeter Model S. [ Ссылка ]
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In this video: Westinghouse DC Voltmeter Type PX-5 and AC Wattmeter Type PY-5.
Next Video: Weston AC Voltmeter Model 904 and Sensitive Research Instrument Co. DC Microammeter Model S. [ Ссылка ]