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| Q. |
During electron beam welding the vacuum is of the order of |
| A. | 10-5 torr |
| B. | 1 torr |
| C. | 10-3 torr |
| D. | 10-4 torr |
| E. | 10-2 torr |
| Answer» A. 10-5 torr | |
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