热轧长材(Welded sections are long products of open cross-section which have a shape characteristics of those products defined in 6. 2. 1. The sections are made up by welding together combination of hot-rolled long products, hot-rolled flat products and cold-rolled flat products instead of being obtained directly by hot rolling. 焊接型钢是具有开口横截面的条钢，它们的形状特点已由 6. 2.1 条界定。焊接型钢不是通过热轧直接获得，而是将热轧条钢、热轧扁平材和冷轧扁平材焊接组合制成。)
