This paper introduces an impact elastic-wave based NDT method suitable for detection of such deep cracks.
本文提出了一种基于冲击弹性波的无损检测技术（简称表面波法）。
Conventional ultrasonic NDT method is quite incompetence for the surface fatigue crack testing of in service rotary shaft.
采用常规超声检测方法对在役转轴表面疲劳裂纹检测的效果很差。
Test specimens shall be taken after all non-destructive testing (NDT) has been carried out and which has passed the relevant inspection criteria for the NDT method(s) used.
试样的截取应在所有非破坏性试验（NDT）已经完成并已经通过所用NDT方法的相关检查依据后进行。
Fluorescent magnetic particle detection is a NDT method that often is used for testing trivial flaws on the surface of some steel workpiece and for controlling qualities of product.
荧光磁粉探伤是一种常用的无损检测方法，是控制产品质量的重要手段，用于检测钢制零件的表面及近表面的裂纹缺陷。
Fluorescent magnetic particle testing is a NDT method that often used for testing trivial flaws on the surface of ferromagnetic materials in order to control the qualities of product.
荧光磁粉检测是一种常用的无损检测方法，用于检测钢制零件的表面及近表面的裂纹缺陷，长期以来一直被认为是表面裂纹检测最灵敏的方法之一。
Fluorescent magnetic particle detection is a NDT method that often used for testing trivial flaws on the surface of ferromagnetic materials in order to control the qualities of product.
荧光磁粉探伤是一种常用的无损检测方法，用于检测钢制零件的表面及近表面的裂纹缺陷，长期以来一直被认为是表面裂纹检测最灵敏的方法之一。
Acoustic emission (AE) technique has been applied to metallic and concrete structures as a nondestructive testing (NDT) method for detection of internal cracks.
声发射技术已经应用于金属和混凝土结构中，作为探测内部裂缝的一种无损检测方法。
Metal magnetic memory technology (MMMT) is new nondestructive testing (NDT) method that can detect the hidden damage in ferromagnetic component early and avoid component-tired damage happen abruptly.
金属磁记忆检测技术是对铁磁设备部件隐性损伤进行早期诊断，防止部件突发性疲劳破损的一种无损检测新技术。
Metal magnetic memory technology (MMMT) is new nondestructive testing (NDT) method that can detect the hidden damage in ferromagnetic component early and avoid component-tired damage happen abruptly.
金属磁记忆检测技术是对铁磁设备部件隐性损伤进行早期诊断，防止部件突发性疲劳破损的一种无损检测新技术。
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