Ключевые слова: ac, alternative, appliance, background, black, board, close, closed, closeup, components, current, dark, details, development, device, digital, digits, display, electric, electrical, electricity, electronics, equipment, indication, indoor, industrial, industry, instrument, lcd, meter, modern, multimeter, object, one, plugged, precision, screen, shot, sine, single, sinusoid, studio, technology, tool, tools, voltage, voltmeter, volts, wires, wooden,