ISO 657-19:1980现行
Hot-rolled steel sections Part 19: Bulb flats (metric series) - Dimensions, sectional properties and tolerances
出版：International Organization for Standardization
专家解读视频
KS D ISO 657-19:2005 - Identical
KS D ISO 657-19:2013 - Identical
KS D 3502:2015 - Modified
SS 21 21 70 Ed. 1 (1986) - Identical
JIS G 3192:2005 - Identical
NFA 45 011:1983 - Similar
NS 6034:1982 - Similar
