对三家大型烟厂进行了劳动卫生学调查 ,并对接尘工人进行了体检。结果新建生产线大大提高了机械化和密闭化程度 ,联用旋风和静电除尘使车间空气中粉尘浓度全部达到国家卫生标准。工人所患呼吸系统疾病与症状低于技改前 (P <0 0 1) ,表明防尘效果明显。 Labor hygiene investigations were conducted on three large cigarette factories and physical examinations were conducted on dust-pick workers. The results of the new production line greatly increased the degree of mechanization and sealing, combined with cyclone and electrostatic dust so that all the dust concentration in the air in the workshop reached the national health standards. Respiratory diseases and symptoms of workers were lower than before the transformation (P <0 01), indicating that dust-proof effect is obvious.