雨伞,大家都使用过。如今,制作雨伞的工艺已经很成熟了,但我认为雨伞还存在待改进的地方:在下雨的夜晚,雨伞不能发光、反光,很难引起驾驶员和骑车人注意;在家里,水会从湿了的雨伞上往下滴,弄得地板湿漉漉的;很多雨伞使用多次后,容易从顶端开始坏;如果玻璃、墙壁或门上没有挂钩,雨伞折叠后就无法悬挂。第一步,我在雨伞的四周加装导线和 Umbrella, we have used. Nowadays, the craft of making umbrellas is very mature, but I think the umbrellas still need to be improved: In the rainy night, the umbrellas can not shine and reflect light, and it is hard for drivers and cyclists to pay attention. At home, Wet umbrellas dripping down, making the floor wet; many umbrellas used repeatedly, easily from the top began to bad; if the glass, the wall or the door is not linked, the umbrella can not be folded after folding. The first step, I am installing wires and around the umbrella