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Cambio de velocidades perfeccionadas para bicicletas, caracterizadas por comprender el montaje de una palanca oscilante, sobre el extremo terminal del eje posterior. Va aprisionado por una tuerca desmontable y reguladora y contiene a su vez una varilla elástica, determinativa de la recuperación de dicho brazo.
ES0059769U1957-04-301957-04-30Cambio de velocidades perfeccionado para bicicletas
PendingES59769U
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