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Duprec S A
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Duprec S A
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Priority to ES426247ApriorityCriticalpatent/ES426247A1/es
Publication of ES426247A1publicationCriticalpatent/ES426247A1/es
ES426247A1974-05-131974-05-13Perfeccionamientos en el sistema de forjado monodireccionalde techos a partir de semivigas prefabricadas.
ExpiredES426247A1
(es)