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Abstract
Un cambio de velocidad por descarrilamiento de cadena para bicicletas y similares, caracterizado por comprender dos poleas de apoyo y tensión respectivamente, situadas en posición vertical y enfrentadas, montadas sobre ejes de giro correspondientes. Estas poleas en su periferia presentan una menor anchura que en el disco.
ES0053870U1956-04-241956-04-24Un cambio de velocidad por descarrilamiento de cadena para bicicletas
PendingES53870U
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