众所周知,在接触粉尘作业劳动生产中,长期地、反复地吸入生产性粉尘,除能引起呼吸系统肺组织的病变外,还能引起气管、支气管产生慢性病理性改变。正常情况下,气管、支气管,直到终末细支气管上衬有纤毛粘液装置,做为气管、支气管树的重要防御机能。这种装置上的纤毛,在正常情况下,以1000次/分的频率,顺时针螺旋式或 As we all know, long-term and repeated inhalation of productive dust in the production of dust-exposed work produces chronic pathological changes in the trachea and the bronchus in addition to causing lung tissue lesions in the respiratory system. Under normal circumstances, the trachea, bronchus, bronchial lining until the end of the bronchial mucus device, as the trachea, bronchial tree important defensive function. Cilia on this device, under normal circumstances, at a frequency of 1000 beats / min, clockwise spiral or