Description
Accoustics, Aeronautics, Automation, Chemistry, Cinematography, Electronics, Electrotechnics, Railways, Physics, Electroplating, Geology, Lightning, Flour Milling, Oil Industry, Civil Engineering, Timber, Machine Tools, Plastics, Mechanics, Mettallurgy, Mineralology, Mining, I. C. Engines, Horology, Nuclear Physics, Optics, Radar, Iron and Steel Metallurgy, Printing, Telephony, Telegraphy, Teelvision, Textiles, Paints and Varnishes.
