毛主席教导我们:“情况是在不断地变化,要使自己的思想适应新的情况,就得学习。……要接受新事物,要研究新问题。”随着我国钢铁工业的蓬勃发展,普通低合金钢日益广泛地应用于包括建筑用钢筋在内的各个领域。它对推动我国的社会主义建设,无疑会产生重大的作用。近年来,许多单位在普通低合金钢筋的焊接方面已积累了不少 Chairman Mao taught us: “The situation is constantly changing. To adapt our thinking to new situations, we must learn.... To accept new things, we must study new issues.” With the vigorous development of China’s steel industry, ordinary Low-alloy steel is increasingly used in various fields including construction steel reinforcement. It will undoubtedly have a major effect on promoting socialist construction in our country. In recent years, many units have accumulated a lot of welding on common low-alloy rebars.