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1. |
What temperature gives maximum fatigue strength of steels? |
A. | Below 100ÀöC |
B. | 100-200ÀöC |
C. | 200-400ÀöC |
D. | 500-600ÀöC |
Answer» D. 500-600‚àö√Ñ‚àö‚àÇC | |