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为了解化工区电焊工的劳动卫生和健康情况,作者于1985年9月对某化工区231名电焊工进行了调查。调查对象中男213名,女18名,年龄17~58岁(平均34.3岁),电焊
In order to understand the labor hygiene and health of the welders in the chemical area, the author investigated 231 welders in a chemical area in September 1985. The survey of 213 males and 18 females, aged 17 to 58 years (mean 34.3 years old), welding