So it's a kind of machine which take advantage of fatigue-fracture.
因而，它是一种化害为利，利用疲劳断裂下料的机械。
2
Under the action of tensile stress and tensile stress, the bolt with relatively low strength will crack first, and then the fatiguefracture will occur.
在拉应力和应拉力交替的作用下，强度相对较低的螺栓会先产生裂纹，进而发生疲劳断裂。
3
The deficiency of present belt drives design criteria is pointed out to get a start in sliding failure and fatiguefracture failure.