本规范涵盖了一种低对比度、细粒度的射线照相胶片，其形式为切割片或卷。正确使用时，该胶片将提供2-2T灵敏度的射线照相质量水平。

This specification covers one type of low-contrast, fine-grain radiographic film in the form of cut sheets or rolls. This film will provide a radiographic quality level of 2-2T sensitivity when properly utilized.