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| Q. |
Which types of lasers are used in Laser beam machining? |
| A. | continuous wave |
| B. | pulsed mode |
| C. | continuous wave & pulsed mode |
| D. | none of the mentioned |
| Answer» C. continuous wave & pulsed mode | |
| Explanation: laser may be in continuous wave (cw) or in pulsed mode (pm) for machining in lbm. | |
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