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At present, electricity resources in poor mountainous areas are scarce, some children have no light source to read at night, and many families are not rich in economic conditions, so their spending on education is limited.One end of the double-pen has a small solar lamp, which stores electricity during the day and can be used for children to read books at night. And open the pen cover can be divided into two pens of different colors, the pen body has a scale can be used as a ruler.
Guangdong University of Technology