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1. |
What is the purpose of a series of slotted rotating discs provided between the electron beam gun and the workpiece? |
A. | It increases the accuracy of the beam |
B. | It can increase the intensity of the beam (if needed) |
C. | It prevents power losses |
D. | It prevents power lossesd) It prevents vapour generated during machining to reach the gun |
Answer» E. | |