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1. The back wash extractor is acrucial tool for removing impurities fromwater.
回洗式提取器是去除水中杂质的关键工具。
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2. The back wash extractorwas designed to improve the efficiency of wastewater treatment.
回洗式提取器被设计用来提高废水处理的效率。
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3. The back washextractor has been widely used in industrialprocesses to remove contaminants.
回洗式提取器在工业过程中被广泛使用，用于去除污染物。