目录简介    |     Contents 1	Scope	 2	Normative references 3	Radiographic Test Personnel	 4	Radiographic Procedures	 5	Negative Quality and Its Observation	 6	Quality Classification of Butt Welded-Joint	 7	Test Reports and Film Preservation	 Appendix A  (The Information Appendix) Radiographic Test Procedure Card	 Appendix B (The Normative Appendix) Types and Specifications of Image Quality Meter, Types and Specifications of Thickness Comparison Piece	 Appendix C   ( The Normative Appendix) Calculation of Radiographic Thickness	
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