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1. |
What is the tensile strength of grade 220 iron? |
A. | 220 Dyne/mm<sup>2</sup> |
B. | 220 N/m<sup>2</sup> |
C. | 220 N/mm<sup>2</sup> |
D. | 220 Dyne/cm<sup>2</sup> |
Answer» D. 220 Dyne/cm<sup>2</sup> | |