... packaging Can be used for oil, shipbuilding, metallurgy, coal, environmental sanitation, automobile manufacturing and other harsh environment of the workplace.Dust collection efficiency ... by the state the highest GB2626-2006 testing standards Patent No. 201130010695.9ModelKN95Standard N95, FFP2, CE EN149:2001,GB2626-2006 ColorWhiteType Folding, Disposable ...