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本文观察连续长时间在无防尘措施、粉尘浓度较高环境与间断、短时间接触，二种不同情况对呼吸功能的影响。从业人员手纺石棉占总接尘人数的８４．４８％；１９８７年２２１名手纺石棉女工及１３５名对照，发现手纺石棉女工呼吸功能均见降低。１９９７年２５名手纺石棉女工全部呼吸功能指标均低于对照组；但每组１０年前后相比，均无明显变化，此现象与接触石棉时间长短、粉尘浓度有关。
In this paper, we observed the effects of two different conditions on respiratory function after prolonged exposure to dust-free measures, high dust concentration environment and intermittent, short-term exposure. Asbestos textile workers accounted for 84.48% of the total population of dust; 1987 221 hand-worsted asbestos women workers and 135 controls, found that aspiration of asbestos textile workers reduce the resumption of life. In 1997, all the 25 workers with asbestos aspirated all the respiratory function indexes were lower than those of the control group; however, no significant changes were found in each group after 10 years. This phenomenon was related to the duration of exposure to asbestos and the concentration of dust.