名词
中文翻译：预过滤
同义词：
['pre-filter', 'pre-screen例句：1. The prefilter is used to remove particles before the main filter.（预过滤用于在主要过滤器之前去除颗粒。）']
例句：
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1. The prefilter is used to remove particles before the main filter.
预过滤用于在主要过滤器之前去除颗粒。
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2.Prefilters are used in water treatment plants to remove contaminants before they reach the main filter.
预过滤装置用于水处理厂，在主要过滤器前去除污染物。
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3. The prefilter was designed to improve the efficiency of the main filter.
预过滤设计旨在提高主要过滤器的效率。