名词中文翻译1
中文翻译：Unknown
同义词：
['steel beam', 'steel girder', 'steel trusses']
例句：
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1. The bridge is made of steel girder and concrete.
这座桥由钢梁和混凝土制成。
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2. He used a steel girder to support the roof.
他用一根钢梁支撑着屋顶。
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3. The steel girder was installed in the middle of the bridge.
钢梁被安装在桥的中间。