DIN EN 25663 (1993-11)现行
Water quality; determination of Kjeldahl nitrogen; method after mineralization with selenium (ISO 5663:1984); German version EN 25663:1993
出版：German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频
ISO 5663:1984 - Identical
UNI EN 25663:1995 - Identical
ONORM EN 25663:1993 - Identical
SNV DIN EN 25663:1993 - Identical
BS EN 25663:1993 - Identical
NBN EN 25663:1994 - Identical
I.S. EN 25663:1994 - Identical
NF EN 25663:1994 - Identical
SS EN 25663 Ed. 1 (1994) - Identical
UNE EN 25663:1994 - Identical
