名词
中文翻译：维持阀
同义词：
['control valve', 'throttling valve', 'pressure relief valve']
例句：
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1. The maintaining valve is responsible for maintaining the proper flow of gases through the system.
维持阀负责确保气体在系统中的适当流动。
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2. The engineer had to replace the maintaining valve due to a leak in the pipeline.
工程师不得不更换管道中的泄漏维持阀。
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3. The maintaining valve was designed to prevent overheating of the engine during high altitude conditions.
维持阀的设计旨在防止在高海拔条件下发动机过热。