seam welding短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 缝焊,缝悍,线焊接,滚焊 The structure of a kind of imported seam welding electric oven and its failure reasons were analyzed. A new improved design for this kind of electric oven was introduced. 分析了原进口焊缝烘炉的基本结构和失效原因，介绍了新的焊缝烘炉的设计方案和结构特点。 cnki