科学研究课题用普通刷子刷东西的时候,如果遇到很脏的地方,又要拿刷子,又要倒洗衣粉,很麻烦。我就想:能不能发明一个带洗衣粉的刷子?研究过程与心得我在鞋刷的头上加装了一个牙签筒,牙签筒里面装洗衣粉。当需要洗衣粉的时候,旋转一下牙签筒的头部,洗衣粉就倒出来了;不需要的时候再旋转一下牙签筒的头部,洗衣粉就不会倒出来了。通过本次 Scientific research topics Brush with ordinary brush things, if you encounter dirty places, but also take a brush, but also pour detergent, a lot of trouble. I would like to: Can you invent a brush with detergent? Research process and experience I added a toothbrush head in the brush head, toothpick tube inside the detergent. When the need for washing powder, rotate the toothpick holder’s head, the detergent poured out; do not need to rotate the toothpick holder’s head, washing powder will not be poured out. Through this time