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直排大气并以抽除水汽为主的湿式罗茨真空泵，广泛用于造纸等行业以代替水环式真空泵，如此可节省能耗．木文论述转子型线为多圆弧——渐开线型的湿式罗茨真空泵的工作阻力、工作阻力矩、有效瞬时功率以及工作阻力的水平分力和铅垂分力．为后续轴及轴承等设计提供已知数据。该文也可用于圆弧——渐开线型转子型线的罗茨增压泵的工作阻力计算（因为后者是前者的一个特例即γ＝０或β＝π／４）。文中给出电子计算机程序框图及一个实例的结果及分析。
Directly to the atmosphere and mainly to extract water vapor Roots vacuum pump, is widely used in papermaking and other industries to replace the water ring vacuum pump, thus saving energy consumption. Wood article discusses the rotor line is multi-arc - Involute wet Roots vacuum pump working resistance, work resistance torque, the effective instantaneous power and work resistance horizontal component and vertical component. Known data for follow-up shaft and bearing design. This paper can also be used to calculate the working resistance of a Roots booster pump with a circular-involute rotor profile (since the latter is a special case of the former γ = 0 or β = π / 4). The article gives the computer program block diagram and an example of the results and analysis.