Ключевые слова: agricultural, aluminum, circle, clockwork, cogs, concept, conceptual, connecting, development, energy, engine, engineering, evolution, force, gear, gears, hi tech, ideas, industrial, machine, machinery, mechanical, mechanics, mechanism, metals, motor, parts, pinion, power, precise, progress, quality, rotate, steel, technical, technology, timing, tools transmission, transport, turning, wheel, wheels,