1、The ministry of oil, packaging department and qc, practiced dustless workshop management.
噴油部，包裝部和質(zhì)檢部，都實行無塵車間管理。

2、The dustless chalk brush is I-shaped.
所述無塵粉筆刷整體呈“工”字型。

3、The dustless chalk is of good quality, go and get some more.
這批無塵粉筆的質(zhì)量不錯，再去買一些吧！

dustless翻譯