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Main shaft is controlled by:

ARibbon Carrier

BRibbon Vibrator

CBichrome Ribbon

DRibbon Reverse Key

Answer:

D. Ribbon Reverse Key

Read Explanation:

Ribbon Carrier : The part of the typewriter which carries ribbon is called ribbon carrier

Ribbon Vibrator : Ribbon carrier is also known as Ribbon vibrator

Bichrome Ribbon : Double colour ribbon is called Bichrome ribbon


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