O rings . dimensional checking and classification of defects O形圈.缺陷的尺寸检查和分类
Classification of defects 缺陷的分类
Classification of defects 缺陷的分类
Welding and allied processes . resistance spot , projection and seam welded lap joints . classification of defects with explanatory comments 焊接和有关技术.电阻点焊凸焊或缝焊搭接接头.带解释的缺陷分类