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| Q. |
What is the value of the limited depth to which form errors, tapers, looping can be corrected? |
| A. | 10 microns |
| B. | 20 microns |
| C. | 30 microns |
| D. | 40 microns |
| Answer» B. 20 microns | |
| Explanation: form errors, tapers, looping etc.., can be corrected up to a limited depth of 20 microns. | |
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