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1. |
What is the dry tensile strength of core sand mixture for general purpose? |
A. | 15 kg/cm<sup>2</sup> |
B. | 16 kg/cm<sup>2</sup> |
C. | 17 kg/cm<sup>2</sup> |
D. | 18 kg/cm<sup>2</sup> |
Answer» D. 18 kg/cm<sup>2</sup> | |