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1. |
What is the wavelength value of CO2 laser used in Laser beam machining?$ |
A. | 0.16 μm |
B. | 1.6 μm |
C. | 10.6 μm |
D. | 106 μm |
Answer» D. 106 ‚âà√≠¬¨‚à´m | |