Magnetic flux leakage (MFL) nondestructive evaluation commonly used in the nondestructive evaluation of ferromagnetic material is an efficient method in inspection of oil pipelines in recent years.

漏磁无损检测普遍用于铁磁材料的无损检测中，是近年来输油管道检测中常用的一种有效方法。

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The quality of welding is an important factor that influences steel structure project quality. Nondestructive inspection is an important method which guarantees welding seam quality.

焊接质量是影响钢结构工程质量的重要因素，对焊缝进行无损探伤检验是确保焊缝质量的重要手段。

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This paper presents the principle of nondestructive pile inspection by the Hydroelectric Effect Method.

本文介绍了水电效应法无损验桩的工作原理。

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