In this process, important innovative technologies, clearly different from those in previous train-cars, as described in the following, came to be practically used only during several years from 1953: The new train-car base supporting high-speeds in addition to 'the Cardan driving method,' which enabled the suppression of vibration and contributed to making passengers feel more comfortable and to enabling high-speed operations, 'all-metal light body train-cars,' which enabled stress to be distributed to side plates and ceilings as well as floor chassis, 'the method of electrifying every train-car,' in which every train-car was equipped with an electric motor to increase acceleration performances, 'the electromagnetic straight brake mechanism,' which provided quick response abilities and allowed it to be handled easily, and 'the 1C8M method (MM unit method),' in which a control unit was shared by two electric power train-cars, contributing to reducing cost and to making the car bodies lighter.
この過程で、振動を抑制し、乗り心地改善と高速運転に資する「カルダン駆動方式」と高速対応の新型台車、床面シャーシだけでなく側板や天井にも応力を分散させた「全金属製軽量車体」、全車両にモーターを搭載して加速力を高める「全電動車方式」、反応速度が速い上に取り扱いが容易な「電磁直通ブレーキ機構」、制御装置1台を2両の電動車で共用して軽量化やコストダウンを実現する「1C8M方式（MMユニット方式）」など、それ以前の電車とは一線を画する重要な革新的技術が、1953年からわずか数年の間に実用化されて普及した。