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1. |
What is the amount of pig iron in a cupola charge? |
A. | 10% – 20% |
B. | 10% – 30% |
C. | 30% – 40% |
D. | 20% – 45% |
Answer» C. 30% ‚Äö√Ñ√∂‚àö√ë‚àö¬® 40% | |