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| 1. | show that the rotation magnetic field is the best way of surface crack detection and lots of extending surface |
| 采用模糊集的贴近度计算对齿轮表面探伤方法进行了优化选择，表明旋转磁场探伤是齿轮表面探伤的最佳方法，在实用中检测出大量的正在延伸扩展的表面疲劳裂纹。 |
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| 2. | surface fatigue wear |
| 表面疲劳磨损 |
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| 3. | surface fatigue |
| 表面疲劳 |
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| 4. | resistance to surface fatigue |
| 抗表面疲劳能力 |
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| 5. | The surface spalling and fatigue failure may occur after a long time of service, during wheel-rail rolling |
| 摘要钢轨钢的接触疲劳一直为铁路运输部门和研究机构所重视。 |
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