Even at the same relative opening degree, the coefficient of minor loss is different for different pipe diameters of valves.
不同管径的阀门，在同一相对开启度下的阻力系数不同。
Even at the same relative opening degree, the coefficient of minor loss is different for different pipe diameters of valves.
不同管径的阀门，在同一相对开启度下的阻力系数不同。
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