Surface cleaning is critically important for pipe coating, and shot (impeller) blasting is the most suitable derusting method for most kinds of coating materials.

钢管的表面处理是决定覆盖层质量的关键因素，对大多数覆盖层而言，喷(抛)丸除锈法是最理想的除锈方式。

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The self-cleaning function of the impeller of the fan improves the adaptability of the sweeping vehicle towards the kinds of sundries.

该风机叶轮的自清理功能改善了清扫车对杂物种类的适应性；

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A smoke extractor with an oil-stain cleaning device consists of a shell, a motor, an impeller, a cleaning circulation pump, an oil sump, a liquor-collecting container and an air inlet cap.

一种带油污洗涤装置的抽油烟机，由罩壳、电机、叶轮、洗涤循环泵、集油槽、集液容器和进风口封盖组成。

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