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Scientific apparatus and instruments as teaching aids in the field of physics, including dynamometers, pulleys, Varignon Force tables, inclined planes, linear air tracks and accessories, electric launchers, photogates, magnetic blackboards for mechanics experiments, Atwood's machines, torsion pendulums, Hooke's law apparatus, pressure strings with pressure gauge, spouting jars, Pascal's apparatus, communicating vessels, instruments for verifying Archimede's law, apparatus for verifying capillarity, Boyle law apparatus, Gunther expansion apparatus, balls and rings apparatus for physical demonstrations, bars breaking apparatus, thermal expansion apparatus, Joule's calorimeters, convection apparatus, conductivity apparatus, ripple tanks, three-wire sonometers, tuning forks with resonance boxes, Kundt's tubes, tuning forks on resonance boxes, optical benches, concave mirrors, optical disks, Newton colour disks, spectrometers, Van de Graaf generators, Wimshurst machines, kit for electrostatic experiments, elettroscopes, faraday wells, cone, sphere, cilinder conductors, pair of condenser plates, models of voltaic cell with different electrodes, magnetic field demonstration apparatus, galvanoscopes, galvanometers, decade resistance boxes, decade capacitance boxes, demountable transformers, coils for demountable transformers, induction coils, Hoffmann voltmeters, wire bridges, Crooke's radiometers, engine models, DC power supplies, low tension power supplies AC/DC, transformers, high tension power supplies, wattmeters, multimeters, oscilloscopes, function generators, kit for mechanics, kit for electromagnetism, kit for electronics, kit for electrochemistry, kit for optics, electronic tubes, physics sensors and data loggers, projectors