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答:先化验以下铁含量,如果铁含量高,可以采用磁滑轮抛尾。
Answer: the first to assay the following fe content, if iron content high, can use magnetic pulley cast the tail.
youdao
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答:先化验以下铁含量,如果铁含量高,可以采用磁滑轮抛尾。
Answer: the first to assay the following fe content, if iron content high, can use magnetic pulley cast the tail.
youdao