However, during the period of circulation use of scrap steel, it causes the content increase unceasingly of the low melting point metallic elements such as Pb in the steel.
但在废钢的循环使用过程中，不可避免地将铅等低熔点金属带入到炼钢炉中。
However, during the period of circulation use of scrap steel, it causes the content increase unceasingly of the low melting point metallic elements such as Pb in the steel.
但在废钢的循环使用过程中，不可避免地将铅等低熔点金属带入到炼钢炉中。
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