The turbine body is cast blank, which complicated shape and high accuracy rate bring certain difficulty for machining.
蜗轮壳体为铸造毛坯，形状复杂，加工精度高，给机加工带来了一定的难度。
Vessel areas rate, vessel density and resin vascular cast of HEr group, model group and blank group are got. Results are compared.
得灯盏细辛组、模型组和空白对照组的血管截面积比值、血管密度值等数据以及颊囊微血管树脂铸形标本， 作观察对比。
However, if you change the refresh rate to a setting that the display or video card cannot support, the display goes blank or the image becomes distorted.
然而，如果你改变的刷新率设置显示器或显卡不支持，显示一片空白或图像变得扭曲。
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