1981年4月25日,国家劳动总局发出通知,要求各有关部门贯彻执行自吸过滤式防尘口罩国家标准。通知说。为了有效地控制粉尘危害,制止矽(尘)肺病的发展,除在粉尘作业场所采取必要的工艺改革、湿式作业、通风除尘等措施外,还必须强调佩戴防尘口罩。自吸过滤式防尘口罩,是一种有效地 April 25, 1981, the State Administration of labor issued a circular calling on all relevant departments to implement self-priming filter dust mask national standards. The notice said. In order to effectively control the dust hazard, to stop the development of silicon (dust) lung disease, in addition to dust removal sites to take the necessary technological reform, wet work, ventilation and dust and other measures, but also must emphasize wearing a dust mask. Self-absorption filter respirator, is a kind of effective