GB/T 40304-2021钢中非金属夹杂物含量的测定钢坯全截面法标准
英文:Determination of content of nonmetallic inclusions in steel—Billet full section method GB/T 40304-2021介绍: 国家标准《钢中非金属夹...
英文:Determination of content of nonmetallic inclusions in steel—Billet full section method GB/T 40304-2021介绍: 国家标准《钢中非金属夹...