名词
中文翻译：暗色阀门
同义词：
['dark-colored valve', 'dark-colored valve']
例句：
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1.The new valve is designed to improve the efficiency of the system.
新阀门的设计旨在提高系统的效率。
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2. The engineers used a special type of valve to control the flow of oil.
工程师们使用了一种特殊的阀门来控制石油的流动。
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3. The valve was replaced after it failed to work properly for several months.
阀门在几个月无法正常工作后被更换了。