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"Nuevo mecanismo de cambio de velocidades para bicicletas", caracterizado por que está provisto de un balancín próximo a las ruedecillas que intervienen en la operación del arrastre de la cadena, siendo la misión de este balancín facilitar considerablemente esta operación al actuar el soporte de sujeción del que va pendiente el mecanismo de cambio.
ES0066251U1958-05-221958-05-22Mecanismo de cambio de velocidades para bicicletas
ExpiredES66251Y
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