介绍了压力容器人孔接管与厚壁筒体相焊时，如何控制产品的质量，避免产生裂纹，焊后通过超声波检测及时发现缺陷。
The paper introduced briefly produce quality control in pressure vessel′s shell and manhole nozzle welding, how avoided crack and found defect by ultrasonic testing after welding.
文中针对飞机机翼大梁的螺接结构，研究其裂纹检测的方法，并完成一条超声波检测裂纹的检测概率曲线。
An inspection approach of the wing beam structure with screws connected is studied. The curve is obtained for inspection probability with ultrasonic detecting cracks.
介绍了一种基于电磁超声波技术的火车车轮表面裂纹自动检测系统的设计方法。
Made a design of electromagnetic acoustic automatic detecting system for surface cracks of the train-wheels.
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