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1. Oxford Dictionary

   tie beam

   • n.
     a horizontal beam connecting two rafters in a roof or roof truss.

   • noun: tie beam, plural noun: tie beams

2. • 更多解釋

   tie beam

   • IPA[ˈtī ˌbēm]

   • n.
     a horizontal beam connecting two rafters in a roof or roof truss.

   Oxford American Dictionary