“Pennsylvania truss”的概念、定义、翻译、参考文献-科学参考

单词	Pennsylvania truss
释义	Pennsylvania truss [¦pen·sǝl¦vā·nyǝ `trǝs] ^{CIVIL ENGINEERING} A truss characterized by subdivided panels, curved top chords on through trusses, and curved bottom chords on deck spans; used on long bridge spans.
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