等比容面 isosteric surface; surface of equal specific volume
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It is a vane pump with high head , small flow and low specific speed , which is smaller , flight and simpler in structure than positive displacement pump mulfistage centrifugal pump , and may handle liquid of high gas or steam content 该泵是一种高扬程,低比速的叶片泵,比容积式泵和多级离心泵体积小、重量轻、机构简单等优点,并可以输送气体或蒸气含量较轻的液体。