名词
中文翻译：Unknown
同义词：
['trusses', 'girders', 'joists']
例句：
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1.The architect designed the roof trusses to support the weight of the building.
建筑师设计了屋顶桁架来支撑建筑物的重量。
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2.The engineer analyzed the structural integrity of the roof trusses.
工程师分析了屋顶桁架的结构完整性。
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3. The construction crew installed the roof trusses before starting the renovation.
施工队在开始翻新之前安装了屋顶桁架。