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Q. |
A 30 mm diameter is being machined when the chuck is revolving at 100 rpm. The cutting speed is nearly |
A. | 50 metres per minute |
B. | 40 metres per minute |
C. | 30 metres per minute |
D. | 60 metres per minute |
E. | 70 metres per minute |
Answer» D. 60 metres per minute |
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