ISO 914:1977废止
Sulphuric acid and oleum for industrial use; Determination of total nitrogen content; Titrimetric method after distillation
出版：International Organization for Standardization
专家解读视频
1ED 1977
UNE 55595:1981 (R1999) - Identical
JIS K 1321:1994 - Equivalent
UNE 55595 : 81(R1999) - Identical
NBN T 03 019 : 1979 - Identical
UNE 55595 : 81(R1999) - Identical
NBN T 03 019 : 1979 - Identical
