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1. |
What is the green compression strength of core sand mixture for general purpose? |
A. | 1/5 kg/cm<sup>2</sup> |
B. | 1/6 kg/cm<sup>2</sup> |
C. | 1/7 kg/cm<sup>2</sup> |
D. | 1/8 kg/cm<sup>2</sup> |
Answer» D. 1/8 kg/cm<sup>2</sup> | |