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molten cast iron
met.	液态铸铁; 熔化的铸铁 (It was discovered that the addition of small amounts-only about 0.04 per cent-of magnesium, or cerium, to molten cast iron would cause the metal when solidified to form the graphite into small nodules instead of flakes. 人们发现，向熔化的铸铁中添加少量，哪怕是仅0.04%左右的镁或铈，就会使铸铁在凝固时形成小球状石墨，而不是片状石墨。)