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1. Oxford American Dictionary

   girder

   • IPA[ˈɡərdər]

   美式

   • n.
     a large iron or steel beam or compound structure used for building bridges and the framework of large buildings

   • noun: girder, plural noun: girders

2. • 釋義

   n.

   名詞

   • 1. a large iron or steel beam or compound structure used for building bridges and the framework of large buildings the tower is made of steel girders criss-crossed to make it stronger