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。
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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