The result showed that the centrifugal casting made the WC particles appear gradient distribution, the hardness of composites displayed gradual lower inward, and the transition zone was strengthened.
结果表明，离心铸造使WC颗粒呈梯度分布，硬度由表及里呈现逐渐降低的趋势，过渡区得到强化；
The wake distribution around ship is further calculated with CFD method including disk of inward propeller and outward propeller.
分别计算了裸船体和附体船桨盘面处的三向速度比随角度变化的分布情况；
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