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Regla para el trazado de paralelas, caracterizada por ser de material transparente, preferentemente de plexiglás para la observación durante su empleo del resto del dibujo, provista en un vaciado interior de la misma de un eje uniendo dos rodillos de metal moleteados que giran a la misma velocidad angular al deslizarse la regla sobre el papel, que así lo hará paralelamente así misma sin posibilidad de giro.
ES0059501U1957-04-121957-04-12Regla para el trazado de paralelas
ExpiredES59501Y
(es)