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前言近年来,国内不少单位就国产低合金高强钢的焊接冷裂纹敏感性,进行了一系列有益的研究,对于某些钢种也有了比较深入的了解。但是,目前对国产低合金高
Preface In recent years, many domestic units made a series of useful studies on the cold crack susceptibility of domestic low-alloy high-strength steel, and also got a deeper understanding of certain types of steel. However, the current low-alloy high