论文部分内容阅读
包钢工业卫生研究所研制成功三种类型的过滤式简易防毒口罩。口罩由两部分组成,即支架和滤料。这种支架,一切有毒作业(?)所均可使用。滤料有三种:Ⅰ型用于防氟蒸
Baotou Institute of Industrial Health successfully developed three types of filter-type simple anti-virus masks. The mask consists of two parts, namely the stent and filter material. This bracket, all toxic jobs (?) Can be used. There are three types of media: Type I is used to prevent fluoridation