But it has smaller volume than displacement compressor at the same mass flow rate; and higher pressure ratio and efficiency than impeller compressor.

且尺寸体积远小于同流量的容积式压缩机，稳定性和压比也比同流量的条件下的叶轮式压气机有所提高。

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At the same time, the mass flow rate and the heat flux density of each cross section of smoke flow were calculated as well.

同时，计算了烟气羽流各截面的质量流量和热流密度。

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At the same time, the effect of liquid temperature, the mass flow and the flow direction on cooling effectiveness were obvious too.

同时表明，致冷液温、流量及液流走向，对致冷效能均有显著影响。

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The same goes for the mass air flow sensor, which calculates the amount of air coming into the car and determining yhow much fuel to shoot into the engine.

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