Cov yeeb nkab siv li cas? Cov kav dej yog siv hauv kev tsim kho, kev thauj mus los, thiab kev tsim khoom. Cov ntaub ntawv sib txawv, cov qauv tsim, thiab kev tsim cov yeeb nkab steel tau hloov kho thiab sib txawv nyob ntawm daim ntawv thov. Structural Uses Cov qauv siv feem ntau txuam nrog cov tsev thiab cons ...
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