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IntroductionThin_walledstructureiswidelyusedinengineering .Itnotonlyhasaroleofdecreasingquantityofstructure ,usingmaterialreasonably ,andimprovingeconomicbenefitsgreatlybutalsohasaroleofbeautifyingstructure’sfacade.Nowadays,becauseoftheseapparentadvantag… 相似文献
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