名词
中文翻译：止回阀
同义词：
['safety valve', 'check valve', 'safety relief valve']
例句：
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1. The engineers installed the check valve to prevent air from entering the engine.
工程师们安装了止回阀以防止空气进入发动机。
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2. The safety valve is designed to release pressure when the tank is overfilled.
安全阀设计成在油箱过满时释放压力。
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3. The check valve is used in the piping system to ensure that fluid flows only in one direction.
止回阀用于管道系统中，确保流体只能单向流动。