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Non-destructive testing. Ultrasonic testing. Specification for calibration block No. 2 Ingestion-build-68772 Prevention of unexpected start-upBS EN ISO 7963: 2010 Non destructive testing. Ultrasonic testing. Specification for calibration block No. 2 BS EN ISO 7963 is an International Standard which specifies the dimensions, material, manufacture and methods of use for calibration block No. 2 for calibrating and checking ultrasonic testing equipment. Contents of BS EN ISO 7963: Foreword Introduction 1 Scope 2 Normative references 3 Terms and definitions 4 Dimensions 5 Material 6 Preparation