名词
中文翻译：减少的质量流量
同义词：
['reduced flow', 'reduced velocity', 'reduced velocity flow']
例句：
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1. Theengineer adjusted the valve to reduce the mass-flow rate.
工程师调整阀门以减少质量流量。
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2. The new design reduces the mass-flow rate by 20%.
新设计减少了20%的质量流量。
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3.In this experiment, we observed a reduction in mass-flow rate as the temperature increased.
在这个实验中，我们观察到随着温度升高，质量流量减小。