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1. |
In production of EDM electrodes, typical ultrasonic speeds, in graphite ranges between? |
A. | 0.01 – 0.10 cm/min |
B. | 0.10 – 0.25 cm/min |
C. | 0.25 – 0.40 cm/min |
D. | 0.40 – 1.40 cm/min |
Answer» E. | |