Objective To understand the status of dust hazard in the new large coal mines and provide the basis for the prevention of pneumoconiosis.
目的了解新建大型煤矿作业场所粉尘危害状况，为今后开展煤矿尘肺防治工作提供依据。
Objective To find out the causes and the harm extent of this serious Silica dust hazard event and discuss the prevention and control measures for small scale quartz workplace.
目的了解造成本次严重矽尘危害事件的原因及危害程度，探讨小型石英粉加工企业矽尘危害的预防和控制措施。
Dust hazard exists in most industrial fields in varying degrees.
尘害在大多数工业领域都不同程度地存在。
Dust hazard exists in most industrial fields in varying degrees.
尘害在大多数工业领域都不同程度地存在。
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