The paper reports the hazard of much more content of Fe and Mn of water, the Fe-removing principle and result by natural Mn, operation caution and methods of extention service life.
分析了水中铁锰含量过多的危害，阐述天然锰砂的除铁原理、除铁效果、操作注意事项和延长使用寿命的方法。
The system normalizes the management form and content of occupational health management, and provides help and support for management and decision-making on occupational hazard of enterprises.
系统规范了企业职业危害管理的形式和内容，为企业的职业危害管理和辅助决策提供了技术支撑。
The core content establishing HSE management system is harmfulness identification and hazard evaluation .
建立HSE管理体系的核心是进行危害识别与风险评估。
Conclusions high content of SiO2 and the tiny granule in the dust has strong effect on inducing the pulmonary fibrosis. Thus quartz powder processing was a high occupational hazard industry.
结论硅粉生产由于粉尘中游离二氧化硅含量高、粒度细、致肺纤维化作用强，是一个职业病危害极大的行业。
The indoor test result of ore samples has shown that the higher the content of iron ions, the faster the speed of sulfide mineral oxidate and the greater the possibility of fire hazard exists.
根据室内矿样试验表明，铁离子浓度愈大，硫化矿氧化速度越快，发生火灾的可能性就越大。
The indoor test result of ore samples has shown that the higher the content of iron ions, the faster the speed of sulfide mineral oxidate and the greater the possibility of fire hazard exists.
根据室内矿样试验表明，铁离子浓度愈大，硫化矿氧化速度越快，发生火灾的可能性就越大。
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