Correct

矿尘

/ kuàng chén / 
Strokes

Example

As a Noun

mine dust

1
Kuàngchén
矿尘
qǔyàngqì
取样器

mine dust sampler

2
Kuàngchén
矿尘
nóngdù
浓度

mine dust density

3
Kuàngchén
矿尘
cèdìng
测定

mine dust surveying