运用正交试验法，找出了超声波探伤轧辊裂纹深度最佳参数组合，提高了超声波探伤的准确度。
Quadrature method is used to work out the optimum parameters and to improve the accuracy of ultrasonic crack detection of roller in the paper.
指出，只有采用湿萤光磁粉探伤法才能有效地检查在湿硫化氢环境下操作的容器可能产生的裂纹。
It was pointed out that the crackles produced on vessels operating under wet H2S circumstance can only be detected effectively by the wet magnetic powder fluorescent method.
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