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這個東西很高深啊,一般來說要使其雙向受力,長寬比要滿足要求,還有要儘量對稱均勻,剛度中心靠近質量中心.很複雜,一般的結構工程師都不講這個問題,因為這是高水准的話題,你多翻翻概念設計的書,參攷著寫.會學到很多的
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