When iron which is unsaturated with respect to carbon is heated in a bed of coke, the concentration of the carbon near the surface is increased by inward diffusion of carbon atoms.
当一块含有不饱和碳的铁放在焦炭床上加热的时候，铁表面的碳含量就会由于内部碳原子的扩散而提高。
When iron which is unsaturated with respect to carbon is heated in a bed of coke, the concentration of the carbon near the surface is increased by inward diffusion of carbon atoms.
当一块含有不饱和碳的铁放在焦炭床上加热的时候，铁表面的碳含量就会由于内部碳原子的扩散而提高。
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