名词
中文翻译：顶部帽
同义词：
['top', 'crown', 'lid', 'cover']
例句：
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1.The top cap protects the engine fromdust and debris.
顶部帽保护发动机免受灰尘和碎片的侵害。
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2. The topcap is made of stainlesssteel and has a smooth surface.
顶部帽由不锈钢制成，表面光滑。
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3.The top cap is designed to fit snugly over the opening of the container.
顶部帽设计为紧密贴合容器开口。