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1·Nondestructive flaw detection of concrete structures is a difficult task, especially for detection of small or shallow flaws.

混凝土结构缺陷的无损检测是一项非常困难的工作，尤其是小尺寸或浅层的缺陷检测非常困难。

2·Magnetic Flux Leakage detection is a new nondestructive testing technique and can be used for the rapid and accurate detection of the flaw and defect for steel structure.

漏磁检测是一个新的无损检测技术，它能快速准确发现钢结构损伤和缺陷。

3·Ultrasonic flaw-detection is widely used in nondestructive testing applications.

探伤 是应用广泛的无损检测方法之一。