Ключевые слова: abstract, accuracy, attached, axle, background, bearing, black, carme, clockworks, closeup, cogs, coupling, crank, engine, engineering, equipment, gear, gearbox, gearing, gearwheels, heavy, industry, inside, interlocked, invention, iron, large, machine laver, mechanical, metal, metallic, motor, parts, pinion, power, shaft, shiny, silver, spinning, sprocket, stainless, steam, steel, strength, technology, torque, turbine, work,