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Discussion on JB/T4730.3

2009-04-02View Original

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In JB/T4730.3-2005, the test block CSⅠ for ultrasonic testing of forgings is a flat-bottomed hole with a diameter of φ2, yet the quality grading for individual defects is based on φ4 + x dB. Isn’t it less convenient than φ2+xdB? Please ask an expert to explain it.

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