The double action vane pump using extensively at present has great energy waste;
目前使用广泛的双作用叶片泵存在着较大的能量浪费；
This paper presented the working principle and structure of the double-action vane pump, analyzed its mechanism of variable displacement and characteristics of energy saving.
本文介绍了双作用叶片式二次元件的结构和工作原理，分析了其节能原理和特点。
This paper presented the working principle and structure of the double-action vane pump, analyzed its mechanism of variable displacement and characteristics of energy saving.
本文介绍了双作用叶片式二次元件的结构和工作原理，分析了其节能原理和特点。
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