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对华山机械厂有关工种进行的生产性粉尘危害程度分级调查表明,喷砂除锈、铸钢挂砂造型的危害程度为Ⅳ级;混合铸铁为Ⅲ级;铸钢清砂为Ⅱ级;工具磨刀为Ⅰ级。并对修订粉尘作业危害程度分级标准提出了建议。
Huashan Machinery Plant on the types of dust carried on the production of dust grading survey showed that the sandblasting rust, casting hanging sand shape hazard level Ⅳ; Ⅲ grade mixed cast iron; sand cast steel grade Ⅱ; tool grinding Knife for the first grade. And put forward suggestions on revising the grading standards of the hazardous degree of dust operation.