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出 处:Journal of Economics and Behavioral Studies. 2012 ;4(5):261-267.
出 版 社:International Foundation for Research and Development (IFRD)
文 章 ID:101672145
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出 处:Advances in Mechanical Engineering and its Applications. 2012 ;2(1):105-114.
出 版 社:World Science Publisher
文 章 ID:100522693