stiffened arched girder是什么意思，stiffened arched girder的翻译，stiffened arched girder音标、读音、用法和例句_开心英文字典

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stiffened arched girder是什么意思，stiffened arched girder的翻译，stiffened arched girder音标、读音、用法和例句_开心英文字典_柠咚词