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本文叙述了用蒸发率法测定真空及航天用油及油脂饱和蒸汽压的原理和方法，以及为此而研制的自动平衡式真空微量天平的构成和工作原理
This paper describes the principle and method of the evaporation rate determination of vacuum and spaceflight oil and saturated vapor pressure of oil, and the composition and working principle of the self-balancing vacuum microbalance developed for this purpose