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Mejoras introducidas en la fabricación de ruedas de pedales de doble engranaje para bicicletas, caracterizada porque las caras externas de las coronas dentadas y ls de los radios de la rueda forman planos únicos con las caras de las partes más exteriores de los órganos de enlace que ensamblan dichas coronas a los radios.
ES0253411A1958-11-191959-11-14Mejoras introducidas en la fabricacion de ruedas de pedales de doble engranaje para bicicletas
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