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Apart from the concrete recipe, the arrangement of the optical fibers is a trade secret. Photo: Norbert Böwing
Das Originalbild hat die Größe 1500 x 1000 Pixel.
Apart from the concrete recipe, the arrangement of the optical fibers is a trade secret. Photo: Norbert Böwing
Das Originalbild hat die Größe 1500 x 1000 Pixel.
