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An advertising device, in which to a helical spring haen, the predominant traeger by the kraftstoesse of a selbsttaetig by means of mercury tilt switch electromagnets are energized alternately in high be set up and down movement
An advertising device, in which to a helical spring haen, the predominant traeger by the kraftstoesse of a selbsttaetig by means of mercury tilt switch electromagnets are energized alternately in high be set up and down movement
