| 摘要 |
<p>The invention is characterised by a rod-shaped body (1) made of iron, and by at least two coil-like windings of copper wire upon this body. The individual turns of the one winding (2', 2'') between the two end faces of the rod-shaped body extend in the longitudinal direction of this body, and the individual turns of the other winding (3) extend in the circumferential direction of the rod-shaped body, so that the two windings of copper wire form a coil cage. <IMAGE></p> |
