The failure of the powder metallurgy valve seat was analyzed by optical microscopy, scanning electronic microscopy, X-rayenergy spectrum and X-ray diffraction.
采用力学、物理性能测试，金相、扫描电镜、能谱和X衍射分析研究了气门座圈产品失效的主要原因。
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Two difference deviations, random fluctuation and system linear deviation have been imitated, their influences on X-rayenergy distinguish power have been compared.
The quantity and the speed of creating image of the industrial CT closely relate to the accelerator's focus, the highest X-rayenergy, X rays dose and dose uniformity.