名词
中文翻译：Unknown
同义词：
['plain beam', 'plain truss', 'plain girder']
例句：
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1.The engineer used a plain girder to support the roof of the building.
工程师使用一根平直的梁来支撑建筑物的屋顶。
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2. The plain girder was designed to resist high winds and earthquakes.
这根平直的梁被设计用来抵抗大风和地震。
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3.He used a plain girder to build a bridge over the river.
他使用一根平直的梁来建造一座横跨河流的桥梁。