ISO 657-1:1989(R2016)现行
HOT-ROLLED STEEL SECTIONS - PART 1: EQUAL-LEG ANGLES - DIMENSIONS
出版：International Organization for Standardization
专家解读视频
This first edition as an International Standard constitues a technical revision of ISO Recommendation R 657-1:1968.
UNE 25223 : 1971 - Identical
NS 2659 : 3ED 1982 - Identical
DIN 1028 : 1994 - Similar to
DIN 1028 E : 1994 - Similar to
UNE 25223 : 1971 - Identical
NS 2659 : 3ED 1982 - Identical
