Ключевые слова: 3d, abuse, alarm, alert, background, blue, brake, caution, color, colorful, control, cyan, danger, device, emergency, equipment, fire, handle, help, icon, illustration, isolated, lever, metal, metro, minimal, minimalism, object, protection, pull, railway, red, render, rendering, rescue, safe, safety, security, sign, stop, switch, symbol, system, technology, train, transport, transportation, vehicle, wall, warning,