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Nueva polea extensible de paso múltiple y diámetro variable, caracterizada por que está constituida por cubo que permite que sobre él se desplacen lateralmente una pluralidad de discos que pueden ser fijados en cualquier lugar del mencionado cubo por medio de una chaveta y el tornillo correspondiente.
ES0074699U1959-06-301959-06-30Nueva polea extensible de paso múltiple y diámetro variable
PendingES74699U
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Rueda perfeccionada de una hilera de bolas simplificada y soporte con cuatro orificios compuesto de cinco bolas colocadas en cinco embutidos que lleva la horquilla