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。
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.
报道一种利用象差校正平场全息凹面衍射光栅作为分光和成象元件的平场多色仪，该多色仪具有谱面平直、使用波段宽、集光本领强、体积小等优点。
In this paper, the flat field polychromator (SPD - I) using an aberration - corrected flat fie1d holographic concave diffraction grating as both spectroscopic and oPtical imaging element is re-POrted.
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