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From the ideas of the designers Yonggu Do and Eunha Seo, the Chalkeeper is the gospel of the teacher. It eats chalk and throws out chalk:
To put it simply, this is a chalk dust recovery and recycling system. We can use it instead of chalk. When we wipe the blackboard, it can collect the chalk dust and avoid the situation where the chalk gray head is full; then, when Accumulated enough chalk dust, press the button, it can be changed back to chalk production, economic and environmental protection.
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