外观滑移面（从滑移痕迹测定出的）会随样品取向不同而发生变化。
The appearance of slip traces was different for different orientations of specimen.
在疲劳载荷经过不同循环数后，试样表面进行金相观测的结果指出，对于所用的合金而言，滑移痕迹的变化都表现出两个明显不同的阶段。
Results of metallographic observations on the specimen surface after various stress cycles show that for all the alloys used, the change of slip marks exhibits two distinctly different stages.
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