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| Q. |
Which of the following chemicals are used in PBM? |
| A. | harmful chlorinated fluorocarbons |
| B. | acid cleaning chemicals |
| C. | dissolvable solvent chemicals |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| Explanation: plasma beam machining uses no harmful chlorinated fluorocarbons, acid cleaning chemicals or any dissolvable solvents. | |
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