某厂电焊作业的劳动卫生学调查朝阳市劳动卫生职业病防治所曲玉环，付伟朝阳市劳动卫生监督监测所张建文对某重型机器厂的水机分厂和运机分厂进行了电焊作业环境氧化锰浓度测定及电焊作业人员的健康状况调查，结果表明，水机分厂空气中氧化锰浓度超标率（８７．７％）大于... Workplace hygiene survey of a factory welding operation Chaoyang City, Occupational Health and Quarantine Office Qu Yuhuan, Fu Wei Chaoyang City, Labor and Health Supervision and Monitoring Institute Zhang Jianwen a heavy machinery plant water machine factory and transport aircraft factory was welding operation environment oxidation Manganese concentration and electric welding workers health survey, the results show that the air plant manganese oxide concentration exceeded the standard (87.7%) greater than ...