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This product is targeted at people over 14 years old. It is initially designed to optimize and improve the redundant processes in the traditional processing and manufacturing of similar products in China to a great extent. With special design, highly sophisticated calculation and technology, the original dozens of processing procedures are greatly simplified. Except springs, screws and refills, all parts are manufactured by one process and a single recyclable material, which greatly reduces the pollution caused by dozens of processes, saves labor, materials and resources, and further achieves the positive effect on environmental protection.