The reason of the strengthening of severe wind belt of low layer is due to the dynamicforce effect of upper layer jet and the transport effect of air particle of low latitude.
低空强风带的加强一方面由于高空急流的动力强迫作用，另一方面来源于低纬空气质点对强风动量的输送作用。
2
It is mainly used in packaging of medicine tea, beauty-slimming tea, health-strengthening tea or other similar fine-particle products.
主要用于药茶、减肥茶、健身茶或其它类似小颗粒物品的包装。
3
It is mainly used packaging of medicine tea, beauty-slimming tea, health-strengthening tea or other similar fine-particle products.