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MANUFACTURE OF WRITING INK PATENT TECHNOLOGY
ENVIRONMENTALLY FRIENDLY AND TIME-DELAYED WIPING

 

ENVIRONMENTALLY FRIENDLY AND TIME-DELAYED WIPINGENVIRONMENTALLY FRIENDLY AND TIME-DELAYED WIPING

 

1.Fully Pass EU SGS Certification

2.Delayed wiping time exceeds 200 days

3.Invention patent products, easy to write, easy to erase, environmental protection and health

 

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