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Priority to JP12367784UpriorityCriticalpatent/JPS6140209U/ja
Publication of JPS6140209UpublicationCriticalpatent/JPS6140209U/ja
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Publication of JPS6325123Y2publicationCriticalpatent/JPS6325123Y2/ja
Method of manufacturing a building element in the shape of a hollow brick, concrete block or the like, and building element made according to this method