Methods Rats were exposed to nylon 66 salt particulate by passive inhalation.Pulmonary morphologic changes and broncho alveolar lavage(BAL)were observed.

• 方法采用大鼠被动式粉尘吸入法染尘,以肺组织形态学改变为观察指标,并参考支气管肺泡灌洗(BAL)的实验结果。