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&lt;/script&gt;</html><description>In regard to the ring jumping, I think the reduction of linkage flux isn&#x2019;t caused to reduction forces; because the mutual forces between bobbin windings and metallic ring is proportional to rating of system leakage flux. Indeed the metallic ring prefer to move toward place where the less linkage flux is linked it (according to &hellip;  &#x627;&#x62F;&#x627;&#x645;&#x647; &#xBB;</description></oembed>
