dustless造句

1、The ministry of oil, packaging department and qc, practiced dustless workshop management.
喷油部，包装部和质检部，都实行无尘车间管理。

2、The dustless chalk brush is I-shaped.
所述无尘粉笔刷整体呈“工”字型。

3、The dustless chalk is of good quality, go and get some more.
这批无尘粉笔的质量不错，再去买一些吧！