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Individual
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Individual
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Priority to ES341899ApriorityCriticalpatent/ES341899A1/es
Publication of ES341899A1publicationCriticalpatent/ES341899A1/es
Sistema de peldanos intercambiables para el ascenso y des- censo por registros a galerias o camaras subterraneas y, en general, para salvar la distancia existente entre dos nive- les a diferente cota.
Procédé de réalisation de pieux en béton fretté pour l'édification de constructions, dispositif pour la mise en oeuvre de ce procédé et pieux ainsi réalisés