Frequency oscillation measuring instrument, circle, 120 hertz, generator
Palabras clave
device,
technology,
electricity,
equipment,
electrical,
electric,
meter,
instrument,
industry,
voltage,
retro,
voltmeter,
measurement,
volt,
hertz,
square,
engineering,
old,
pointer,
white,
frequency,
industrial,
metal,
signal,
panel,
switch,
sine,
laboratory,
closeup
){kind=link}