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ES0001013U1932-05-061932-05-06Placas de cemento, o amianto o materias similares, con dispositivos para aireación e iluminación de desvanes.
ExpiredES1013Y
(es)
Un dispositivo para la fijación estanca de techumbres onduladas de cemento de amianto, metálicas, de vidrio y demás cubiertas o tejados de materiales análogos.
Procedimiento para la fabricación de objetos de hormigón, cemento o cemento y amianto, que son dieléctricos, resistentes a los agentes agresivos e impermeables a los gases.