A device for lying or sitting on includes a frame and also a covering which is stretched over the frame and defines a surface for lying or sitting on of the device for lying or sitting on. A tensioning device is adapted to interact with the frame and/or the covering in order to vary the pre-tensioning force which acts upon the covering.
Device for lying or sitting on
21.07.2015
Patent
Elektronische Ressource
Englisch
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