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| 1. |
What is the firing temperature of structural clay products?$ |
| A. | 120-180<sup>o</sup>C |
| B. | 240-300<sup>o</sup>C |
| C. | 780-940<sup>o</sup>C |
| D. | 980-1095<sup>o</sup>C |
| Answer» E. | |