The stress analysis, microstructure change and deformation law of the elbow of the radiation superheater of a 500MW power boiler were studied and the reason of its failure was discussed.
研究了某电厂500MW锅炉水冷壁辐过管弯头在服役条件下受力特征、显微组织变化和变形规律，探讨了其开裂原因。
From the perspective of system failure, this thesis tries to analysis the causes of environmental problems, pointing out environmental law is critical to solve out environmental crisis.
本文从制度失灵的角度分析环境问题的成因，指出环境法对于解决环境危机具有不可或缺性。
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