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Perfeccionamientos en la fabricación de cremalleras, caracterizados porque los dientes se constituyen con una cadena dotada de espiras u ondulaciones que, a su vez, se dotan de salientes en los sitios de cierre, todo ello con la particularidad de que se construyen los dientes partiendo de un perfil liso pero dotado, al menos, de una ranura longitudinal.
ES0252572A1958-09-251959-09-25Perfeccionamientos en la fabricacion de cremalleras
ExpiredES252572A1
(es)