Butterfly shape petal fracture analysis of aup leading gas valve on boeing 777 plane 引气活门蝶形瓣片断裂分析
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Aup : administration unit pointer 管理单元指针
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Aup air university press 空军大学出版社
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Variance and covariance components of each effect were estimated by minimum norm quadratic unbiased estimation ( minque ) method 用minque法估计各项效应的方差和协方差分量，用aup法预测随机效应。
