Volumetric efficiency is a very important parameter to test whether the engine has a good process of air exchange, its also an important guide line to scale the engine performance.
充量系数是表征换气过程进行完善程度的一个极为重要的参数，是衡量发动机性能的重要指标。
Volumetric efficiency is a very important parameter to test whether the engine has a good process of air exchange, its also an important guide line to scale the engine performance.
充量系数是表征换气过程进行完善程度的一个极为重要的参数，是衡量发动机性能的重要指标。
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