一、探伤人员要评片 ,四项指标放在先*,底片标记齐又正 ,铅字压缝为废片。二、评片开始第一件 ,先找四条熔合线 ,小口径管照椭圆 ,根部都在圈里面。三、气孔形象最明显 ,中心浓黑边缘浅 ,夹渣属于非金属 ,杂乱无章有棱边。四、咬边成线亦成点 ,似断似续常相见 ,这个缺陷最好定 First, the inspectors to comment on the film, four indicators on the first *, the film labeled Qi and positive, type stitching for waste film. Second, the film began the first piece, first find four fusion lines, small diameter tube according to the oval, root in the circle inside. Third, the stomatal image is the most obvious, the center dark edge of the dark, slag is non-metallic, disorganized edge. Fourth, bite the edge into a line into the point, it seems like a broken continue to meet, the best set of defects