And the eruption grain that different volcanic gush gives out is different, coarse level is different, to the influence of the plane degree also differs.
而不同的火山喷发出的火山灰颗粒不同，粗糙程度不同，对飞机的影响程度也就不同。
2
Based on sediment transport experiments, the interaction between flow and sediment movement is analysed and the problems of grain resistance and bed load transport on plane movable bed are discussed.