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DL T 821-2002 钢制承压管道对接焊接接头射线检验技术规范
ISO 17640-2010 Non-destructive testing of Ultrasonic testing Techniques, testing levels, and assessment
ISO 5817- 2014 Welding - Fusion-welded joints in steel, nickel, titanium an
TSG-R7001-2013压力容器定期检验规则
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