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| 1. |
The heat of each electrical spark generated during machining is around_____ Fahrenhei? |
| A. | 1,000° to 2,000° |
| B. | 1,100° to 5,000° |
| C. | 10,000° to 12,000° |
| D. | 15,000° to 21,000° |
| Answer» E. | |