单词：iron filings
iron filings的用法和样例：
例句
- The iron flings align themselves in the direction of the magnetic field.铁屑按磁场的方向排列。
- Printing and dyeing wastewater was treated by the two wastes, iron scraps and fly ash.摘要利用废铁屑与粉煤灰两种废物集合处理印染废水。
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