Other causes include the out - of - tolerance of blade chord width between adjacent blades, the undersize contact area of serrated working side and the local wearing of non - working side.
而相邻原机件叶片弦宽尺寸超差，锯齿形工作接触面积小，以及非工作面局部碰磨，是引发故障的次要因素。
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