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论述利用射线透照等效系数确定非钢材料曝光条件及确定非钢材料最大透照厚度的方法；透照铝、钛制容器时，用其它像质计时应发现的像质指数。
Discusses the method of determining the exposure conditions of non-steel materials and determining the maximum transillumination thickness of non-steel materials by using the equivalent coefficient of radiographic transillumination; and the image quality index which should be found by other image quality when transilluminating aluminum and titanium containers.