名词
中文翻译：保持盖
同义词：
['cap', 'retaining cap']
例句：
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1.The engineer used a retaining cap to hold the concrete in place.
工程师使用一个保持帽来固定混凝土。
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2.The construction crew needed a retaining cap to support the weight of the building.
建筑工人需要一个保持帽来支撑建筑物的重量。
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3.The engineer had to install a retaining cap to prevent water from seeping into the foundation.
工程师必须安装一个保持帽以防止水渗入地基。