PN Z04018-04-1991
空氣純度保護.游離結晶二氧化硅含量的測試.通過比色法測定在工作場所游離結晶二氧化硅占全部和可吸入粉塵中硅酸鹽百分比
Air purity protection Tests for free crystalline silica content Determination of free crystalline silica in total and respirable dust in the presence bf silicates in work places by colorimetric method