名词
中文翻译：球形阀门同义词
同义词：
['spherical valve', 'spherical check valve']
例句：
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1. The ball valve is used to control the flow of oil in pipelines.
球阀用于控制管道中石油的流动。
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2. The spherical valve is designed to prevent air from entering the system.
球形阀门设计用来防止空气进入系统。
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3. The spherical check valve is used to ensure that only one direction of flow is allowed.
球形止回阀用于确保只有一种流向是被允许的。