There is no internal scale product of dry screw pump owing to the late research starting, so like products are all depend on importing and the price is very expensive.

由于国内螺杆干泵的研究起步较晚，目前还没有规模化的产品，同类产品全部依靠进口，价格十分昂贵。

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Vertical three-screw pump internal simple and compact structure, high efficiency, strong self-priming capacity, energy saving effect is good;

立式三螺杆泵内部结构简单紧凑，效率高、具有很强的自吸能力、节能效果好；

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