rilytree 发表于 2013-12-25 11:35:52

EN15317 2007.03.30 Non-destructive testing - Ultrasonic testing - Characterizat

EN15317 2007.03.30  Non-destructive testing - Ultrasonic testing - Characterization and verification of ultrasonic thickness measuring equipment

liuxilin1215 发表于 2013-12-25 11:35:53

BS EN 15317-2007
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