File:RMFpatent.PNG

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current02:17, 5 November 2008Thumbnail for version as of 02:17, 5 November 2008400 × 845 (55 KB)File Upload Bot (Magnus Manske) {{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|A rotating magnetic field is a magnetic field which periodically changes direction. This is a key principle to the operation of alternating-current motor. In 1882, Nikola Tesla identified

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