It is shown that for the rectangular microchannel, the microchannel's aspect ratio has much more effect on its pressure drop gradient, while the placing manner of the microchannel has less effect.
发现对于矩形微通道来讲，通道的深宽比对其压力降梯度影响较大，而放置方式对其压力降梯度的影响不太明显。
The spread range gets smaller because of threshold pressure gradient, and there will be a additional pressure drop in the bottom of the well because of the skin damage.
启动压力梯度使压力波传播范围变小，井底污染会造成一个附加压力降。
Standard grids have advantageously shaped elements to provide high magnetic field and gradient near collecting edges, while causing very low pressure drop.
标准滤线栅便于形成在收集边缘提供高磁场和高梯度的要素，压降较低。
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