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Perfeccionamientos introducidos en los anillos estancos y de presión para uniones de tuberías conductores o sin lares caracterizados porque consta de dos partes axiales simétricas conformadas para cooperar con dos conos interiores opuestos practicados una con otra y conjuntadas en otra forma.
ES0211437A1953-05-111953-09-29Perfeccionamientos introducidos en los anillos estancos y de presion para uniones de tuberias, conductores y similares
ExpiredES211437A1
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