名词
中文翻译：真空回线系统
同义词：
['vaccum return line system', 'vacuum return circuit system']
例句：
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1. The vacuum returnline system is essential for maintaining the cleanliness of the air in a laboratory.
真空回线系统对于实验室中空气的清洁至关重要。
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2. The vacuum return line system was designed to prevent contamination during the manufacturing process.
真空回线系统被设计用来在生产过程中防止污染。
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3. The vacuum return line system is used to recycle air and waste gases back into the environment.
真空回线系统用于将空气和废气回收到环境中。