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PROBLEM: The traditional blackboard has limited space, thus small capacity for contents.
SOLUTION:Targeting on this problem, we designed this pages blackboard, which has many pages of blackboards joined together. It works just like a book by having a metal axle, which connects all the Blackboard Pages. It can be written on both sides and be displayed with an angle of 180 degrees. In this way, it greatly increases the space for display. The cleaning work can be done after class, and then the blackboards can be closed in order not to take up too much space.
Beijing Institute of Technology