Ключевые слова: ac, accumulator, amplifier, background, board, business, checking, circuit, closeup, component, current, dc, digital, electric, electrical, electrician, electricity, electronic, engineer, equipment, fix, hand, industry, inspection, inspector, integrated, maintenance, measuring, mechanic, multimeter, part, power, probe, repair, repairman, service, support, system, technician, technology, test, tool, voltage, volts, work, worker,