Apply with chemical combination technology. it form nonadhesive film. which can 't adhibit dust easily. and pollution is easy to clearly to chalk.

应用化合架桥技术形成非粘著性涂膜，不易粘上灰尘。对粉笔、蜡笔等所沾上的污渍也特容易清洗。

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Apply with chemical combination technology. it form nonadhesive film. which can 't adhibit dust easily. and pollution is easy to clearly to chalk.

应用化合架桥技术形成非粘著性涂膜，不易粘上灰尘。对粉笔、蜡笔等所沾上的污渍也特容易清洗。

youdao