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TOEFL BNC: 21774 COCA: 20797

a long, thick piece of metal or concrete, etc. that supports a roof, floor, bridge, or other large structure大梁;桁

steel roof girders钢制屋梁
TOEFL BNC: 21774 COCA: 20797
TOEFL BNC: 21774 COCA: 20797
girder noun
post
TOEFL BNC: 21774 COCA: 20797
girder
Building materials: adobe, aggregate, asbestos...

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