ISO 5397:1984现行
Leather - Determination of nitrogen content and "hide substance" - Titrimetric method
出版：International Organization for Standardization
专家解读视频
SANS 970 Ed. 1 (2010/R2016) - Identical
UNE 59018:1986 - Identical
BS 1309:1974 - Equivalent
NFG 52 206:1976 - Similar
DIN 53308 (1968-10) - Identical
ONORM S 7009:2004 - Identical
KS M ISO 5397:2002 - Identical
