Ключевые слова: alarm, box, building, business, call, city, communication, concept, contact, control, danger, electric, electricity, emergency, energy, equipment, help, industry, line, machine, metro, modern, passenger, phone, public, railway, red, rescue, safety, security, service, sign, situation, sos, station, subway, symbol, system, technology, telephone, train, transport, transportation, travel, urban, urgency, wall, white,