Numerical simulation using the methods of characteristics in a horizonal pipeline, the pressure drop in inclined pipeline, and the long distance plug-flow pneumatic conveying are reviewed.

此外评述了用特征线方法进行水平管的数值模拟，倾斜管的压力降计算和长距离的栓流气力输送。

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The pressure drop and solid slug velocity in horizontal pulsed dense phase pneumatic transport are investigated by using PVC powder as transporting material.

本文以聚氯乙烯树脂为输送物料，测定了水平脉冲气力输送的料栓速度和压力降。

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Finish the pneumatic design of all the functions of hill-drop drill, and produce the pneumatic circuit drawings.

对气动部分的各种功能进行了设计，并绘制出气动回路图。

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