Respirable dust has the distinctive features of tiny in particulate diameter, long-suspending and invisible to naked eyes.It is easy to be deposited in pulmonary alveoli causing CWP.

• 呼吸性粉尘粒径小、悬浮时间长、肉眼不可见，极易被吸入人体的肺部并沉积于肺泡区内，随著沉积量的增加，可引发尘肺病。