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郭根来等(金川有色金属公司劳动卫生职业病研究所)报道:为了解CO_2保护焊作业工人健康情况,我们于1984年12月对某厂焊接车间进行了调查。结果:车间空气中焊尘浓度为0.50～18.33mg/m~3,游离SiO_2含量为2.92～4.28％,锰(MnO_2)含量为0.035～0.280mg/m~3,噪声为92～109dB
Guo Genlai (Jinchuan Nonferrous Metal Co., Ltd. Institute of Occupational Health and Occupational Diseases) reported: In order to understand the health status of CO 2 shielded welding workers, we conducted a welding workshop in December 1984 to conduct a survey. Results: The dust concentration in the air was 0.50 ~ 18.33mg / m ~ 3, the content of free SiO_2 was 2.92 ~ 4.28%, the content of MnO_2 was 0.035 ~ 0.280mg / m ~ 3 and the noise was 92 ~ 109dB