Ключевые слова: bearing, bevel, box, cogs, cogwheel, connection, cross, detail, device, drive, driver, engine, engineering, equipment, gear, helical, industrial, industry, inside, instrument, internal, mechanical, metal, motor, parts, planet, planetary, power, ratio, reduce, reduction, ring, rotation, section, servo, set, shaft, show, speed, spin, study, sun, system, technique, technology, tool, torque, transmission, wheel, worm,