| 摘要 |
A switching device selectively connects a number of incoming electrical lines with a number of outgoing electrical lines. The incoming and outgoing lines are each connected to individual contact surfaces, respectively. The contact surfaces are arranged in concentric ring-shaped areas. A maneuvering unit is arranged in the center of the ring-shaped areas. A driver rotates the maneuvering unit. A number of contact elements are positioned by the maneuvering unit, to obtain electrical contact between specific, contact surfaces.
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