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una polea para correa dentada -<PROTECTED>- de pequeño diámetro se encuentra acoplada al eje exterior del motor -97-.
a small diameter toothed belt pulley <PROTECTED> is fitted on the output shaft of the motor 97.
una polea para correa dentada -<PROTECTED>- de gran diámetro se encuentra acoplada al extremo inferior del husillo de bolas -79-.
a large diameter toothed belt pulley <PROTECTED> is fitted on the lower end of the ball screw shaft 79.