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4.1 引言射线照相主要用于检验铸造缺陷和焊接缺陷,对于这些缺陷,按着射线照相检验的特点,下面把它们简单地分为三类:
4.1 Introduction Radiography is mainly used for the inspection of casting defects and welding defects. For these defects, according to the characteristics of radiographic examination, they are simply divided into three categories: