1. Square files are used to enlarge square and rectangular openings,
filings, slots, keyways and other similar purposes.
主要是为了扩大方形和长方形、锉削、槽孔、键槽和其他相似的用途。
2. The best presidents are like magnets below a piece of paper, invisibly aligning iron
filings into a new pattern of their making.
最好的总统，就像放在纸下面的一块磁铁，虽然看不见，但会吸引铁渣形成新的图案。
3. Analysis using trouble tree method of safety system engineering to an accident of double legs cut by belt
filings is made and the protective measures are put forward.
利用安全系统工程学中事故树分析法对带状屑割伤车工双腿事故进行了分析，并提出了防止事故发生的预防措施。
