Ключевые слова: ammeter, analog, background, business, careful, caution, center, closeup, control, danger, dangerous, device, digital, display, electric, electrical, electronic, energy, engineering, equipment, factory, first, high voltage, hydroelectric, industrial, machine, maintenance, marketing, mechanism, meter, occupational health, occupational health and safety, power, pressure, rack, safety, security, server, service, support, switch, system, technical, technician, technology, warning,