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Application filed by Reinhard ReentsfiledCriticalReinhard Reents
Publication of CH45251ApublicationCriticalpatent/CH45251A/de
Järnbetontak ägande jämn undre ytan och bestående av enskilda järnbetonbågstycken mellan järnbetonbjälkar eller mellan järnbalkar, resp. nitade järnbjälkar