A wide and very sensitive speed control is usually required in case of
A. elevators
B. steel rolling mills
C. colliery winders
D. all of the above
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Answer: D
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A wide and very sensitive speed control is usually required in case of
A. elevators
B. steel rolling mills
C. colliery winders
D. all of the above
Answer: D
Share your understanding of this question with the correct explanation.