The natural form of carbon in cast iron is the free graphite flake form.
铸铁内的碳天然形式是游离石墨薄片形式。
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。
Magnetic susceptibility of polygranular carbon and graphite materials obtained with a new measurement technique, which avoids free rotation of the samples in the magnetic field, was investigated.
用一种能避免样品在磁场中自由转动的新的测定技术测定了多粒炭石墨材料的磁化率。
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