positive column meaning in Chinese

【电学】阳辉区，阳极区。

Finally, the positive column is reached where electrons and ions have equal densities .
最后到达的区域是正柱区，这里，电子和离子具有相等的密度。
In this paper , we focus on the following three topics : ( i ) density distribution of dusty plasma in the low - pressure collisionless positive column the radial density distributions of electron , ion and dust particle in the low - pressure collisionless positive column are investigated with a fluid theory and a self - consistent dust - charging model
本文着重以下三个方面的研究： ( )低气压无碰撞辉光放电正柱区尘埃等离子体密度径向分布本文采用流体模型和自洽的尘埃充电模型，研究了低气压无碰撞辉光放电正柱区的电子密度、离子密度和尘埃粒子密度的径向分布。