Emelkedő olvasztott vasúti kocsi universalmotor wiki cikk tipikusan vetélytárs
File:Universalmotor 1.JPG - Wikimedia Commons
File:Universalmotor 4.JPG - Wikimedia Commons
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DC motor - Wikipedia
arduino - Controlling a 240V AC Universal Motor with Microcontroller, Optoisolator & TRIAC - Electrical Engineering Stack Exchange