Ключевые слова: abstract, accuracy, background, blue, business, circle, clockwork, closeup, cog, cogwheel, colorful, concept, connection, construction, cooperation, design, detail, development, energy, engine, equipment, gear, green, group, industrial, invention, machine, machinery, mechanic, metal, motion, objects, orange, part, plastic, power, progress, red, rotation, shape, teamwork, technical, technology, transmission, turning, vehicle, wheel, white, work,