标 准 编 号：EN 30042-1994 中文版简体中文标题：铝和铝焊合金弧焊接头 缺陷质量分级指南 繁体中文标题：铝和铝焊合金弧焊接头 缺陷质量分级指南 English Name：Arc-welded joints in aluminium and its weldable alloys - Guidance on quality levels for imperfections ...