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1. |
If n=rpm of the bull wheel, cs =cutting speed=3.2mm/minute and m= the ratio between return time to cutting time= 3 and l=length of cutting stroke (l)=8mm. Find the value of n. |
A. | 2 |
B. | 5 |
C. | 12 |
D. | none of the mentioned |
Answer» E. | |