直流式水力活塞泵 direct-flow hydraulic pump 直作用控制软管 direct-function control hose 直读粘度计 direct-indicating viscometer ..
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Centrifugal pump is a commonly hydraulic machine, whose inner flow has direct influence on pump's performance and is a considered problem by the pump designers.
离心泵是一种通用水力机械，其内部流动情况一直是泵设计人员十分关注的问题，因为泵内流动的优劣直接影响泵的性能。
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