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ES1978236564U1978-06-081978-06-08Conjunto prefabricado para el forjado de tramos de escalera en hormigon armado, pretensado o postensado.
ExpiredES236564Y
(es)
Armatura per costruzioni in conglomerato armato, come conglomerato cementizio armato, particolarmente per l'edilizia, emetodo di costruzione utilizzante tale armatura.