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| Q. |
For centreless grinding the surface speed is |
| A. | 1200 to 1500 metres per minute |
| B. | 600 to 900 metres per minute |
| C. | 500 to 600 metres per minute |
| D. | 1500 to 1800 metres per minute |
| E. | Parting off |
| Answer» D. 1500 to 1800 metres per minute | |
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