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Marriagegreen.com Szh Has Never After Marriage Green Marriageport.com R M.you.jizz.com P Szh 1 Marriage Port 箱梁 - 维基百科,自由的百科全书

Marriagegreen.com Szh Has Never After Marriage Green

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Marriageport.com R M.you.jizz.com P Szh 1 Marriage Port

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The patent curved and tapered box girder jib of a Fairbairn steam crane

箱梁英文Box girderTubular girder),又稱箱型樑,是桥梁工程中的一种建築構件,内部呈空心状,上部两侧有翼缘,形狀箱子,因此而得名。分有单箱及多箱等種類。

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