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报道:1991年,根据中华人民共和国《生产性粉尘作业危害程度分级》GB5817—86标准,以粉尘中游离二氧化硅含量,工人接尘时间肺总通气量以及粉尘浓度超标倍数三项指标,将粉尘作业危害程度分为0、Ⅰ、Ⅱ、Ⅲ、Ⅳ级。在普查的近30个企业中,粉尘危害分级工种156个,接触粉尘作业职工923
Reported: 1991, according to the People’s Republic of China “Classification of hazardous dust operations” GB5817-86 standard, with free silica content in dust, the total amount of lung ventilation and dust concentration exceeded the three indicators of dust concentration, Dust operation hazards will be divided into 0, Ⅰ, Ⅱ, Ⅲ, Ⅳ level. Nearly 30 enterprises in the census, dust grading 156 kinds of graded work, contact dust workers 923