| 摘要 |
In a switch for rail points arranged to move two rails interconnected at one of their free ends, between two end positions in engagement with the inner face of one of two rails of e.g. a railroad track, a box girder having the configuration and dimensions of a conventional sleeper supporting the rail track, the box girder housing an electrically driven mechanism arranged to effect the movement of the two rails to the end positions thereof, and also a mechanism arranged to indicate when the two rails assume their intended end positions.
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