The book contains reference information on units of measurement, mechanics, theory of mechanisms and machines, heat engineering, electrical engineering, electronics, material resistance, interchangeability, tolerances and fits, dimensional chains, shafts, axles, couplings, rolling and sliding bearings, gear, worm, belt, chain and friction gears, variators, screw mechanisms, threaded, key, toothed (splined), wedge, keyless, yach are connected. springs, springs, lubricating and sealing devices.