Ключевые слова: abstract, art, background, card, cardiology, cog, cogwheel, concept, construction, day, decoration, design, device, drawing, element, engine, engineering, gear, gearing, gears, graphic, group, heart, illustration, image, industrial, industry, love, machine, machinery, mechanical, mechanism, metal, nubes, part, pinion, robot, romance, romantic, steel, style, symbol, tech, technology, teeth, turning, valentine, vintage, wheel,