名词
中文翻译：凸缘
同义词：
['flap', 'flange', 'flange face']
例句：
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1.The boat had a large flange that could be used to attach ropes.
这艘船有一个大的凸缘，可以用来系绳子。
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2.The door has a flange that can be adjusted to fit different doors.
门有一个可以调整的凸缘，以适应不同大小的门。
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3. The car's hood has a flange that helps it stay open when the engine is running.
汽车的引擎盖有一个凸缘，当引擎运行时可以帮助它保持打开状态。