名词
中文翻译：主梁
同义词：
['mainbeam', 'main frame', 'main girder']
例句：
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1. The engineerdesigned the bridge to be strong enough fora master bracket.
工程师设计这座桥足够坚固，能够承受主梁的重量。
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2. The construction of the bridge required theinstallation of several master brackets.
建造这座桥需要安装几个主梁。
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3. Theweight of the structure was supported by themaster bracket system.
结构的重量由主梁系统支撑。