Therefore, the study of low permeability reservoir of CO2 injection ability on improving the efficiency of gas injection is very important.

因此，研究低渗透油藏CO2注入能力对提高注气效率具有非常重要的意义。

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Study of leakage between high pressure and low pressure in CO2 rotary expander is important for improving the efficiency of expander.

研究CO2转子膨胀机内高低压间泄漏问题是提高膨胀机效率的途径之一。

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With high oil consumption and low thermal efficiency of boiler truck, a new type burner nozzle is brought forward based on the analysis study of the burning mechanism of boiler.

针对锅炉车燃烧时耗油量大、锅炉热效率低等特点，从锅炉的燃烧机理上进行了分析和研究，提出了一种新型燃烧器。

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