... 悬挂式清箱装置pendant shaking equipment 选别废料selected scrap 雪明碳铁，雪明碳体cementite ...
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The scrap must be carefully selected to contain exactly the right ingredient before it is sent into the electric to be furnaced.
熔炼前必须先经过仔细挑选，以保证其成分完全符合要求。
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