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(二)热轧不等边角钢标准 进行对比的有以下10个国家(组织)的12个标准: 国际组织:ISO657/2—1989《热轧型钢—不等边角钢尺寸》 ISO657/5—1976《等边角钢和不等边角钢尺寸偏差》
(B) There are 12 standards of the following ten countries (organizations) for comparison of the hot rolled unequal angle steel standard: International Organization: ISO657 / 2-1989 “Hot-rolled steel-unequal angle steel” ISO657 / 5-1976 “Equal angles and unequal angular dimension deviation”