Q.27 A strip is to be rolled from a thickness 30 mm to 15 mm using...

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Q.27 A strip is to be rolled from a thickness 30 mm to 15 mm using a two high mill having rolls of diameter 300 mm. The coefficient of friction for unaided bite should nearly be Q.27 A strip is to be rolled from a thickness 30 mm to 15 mm using a two high mill having rolls of diameter 300 mm. The coefficient of friction for unaided bite should nearly be