
Sulphuric acid and oleum for industrial use - Determination of total acidity, and calculation of free sulphur trioxide content of oleum - Titrimetric method
出版:International Organization for Standardization

专家解读视频
NBN T 03 016:1979 - Identical
JIS K 1321:1994 - Equivalent
NFT 20 291:1982 - Identical
UNE 55592:1981 (R1999) - Identical