“economic service period”的概念、定义、翻译、参考文献-科学参考

单词	economic service period
释义	economic service period Encyclopedia 经济学经济服务期释 economic service period经济服务期固定资产从投入使用到在经济上不合理而被报废的时间周期。
随便看	sum of squares within classes sum of submodules sum of subspaces sum of the digits sum of vectors sum operator sum over state sum over states sump sump level control for hydrocyclone feeding process sum-product number sumption sum relation sum rule sum rules sum sequence sum series sum-set sum-set axiom sum spectrum SUMT sum term sum test sum theorem sum theorem for dimension

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