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| Q. |
Which of the following, are the main uses of etchants applied in Chemical milling? |
| A. | good surface finish |
| B. | uniform material removal |
| C. | control intergranular attack |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: in chm, etchants are used for the above mentioned factors. | |
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