铸铁内的碳天然形式是游离石墨薄片形式。
The natural form of carbon in cast iron is the free graphite flake form.
球墨铸铁是一种铁、碳、硅的合金，其中碳以球状游离石墨存在。
Ductile iron is the alloy of iron, carbon and silicon, of which carbon is in the form of spherical free graphite.
球墨铸铁是一种铁、碳、硅的合金，其中碳以球状游离石墨存在。
Ductile iron is the alloy of iron, carbon and silicon, of which carbon is in the form of spherical free graphite.
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