Within a small compass hundreds or thousands of feet of grid edges divide and re-divide the stream so that all particles must pass through a succession of strongly convergent magnetic fields.
小罗盘上有成百上千的栅格边，可将溪流分开或再分，这样，所有粒子都要通过一系列吸附性的强磁场。
2
Contribution percentages about precipitation to runoff were calculated to divide rapid flow and slow flow in the model, the proportion of them of Wuyandong subterranean stream system is 2 to 3.