名词
中文翻译：后曲柄泵机组
同义词：
['back-reciprocating pump', 'back-crank pump', 'back-crank pumping unit']
例句：
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1. The back-crank pump is used to remove wastewater from the industrial process.
后曲柄泵用于从工业过程中去除废水。
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2. This back-crank pump can handle high pressure and low flow rates.
这种后曲柄泵可以处理高压和低流量。
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3. The back-crank pump is essential for maintaining the cleanliness of water systems.
后曲柄泵对于保持水系统清洁至关重要。