Low-light quantum teaching board

Multifunction
It can replace traditional blackboards and green boards for routine teaching.
â—† No dust
Writing and erasing are convenient and labor-saving, and there is no dust, and 100% dust-free teaching is achieved. The low-light quantum environmen

Analysis: Screen positioning technology

Prints have flat surfaces, curved surfaces, and low-spherical surfaces. I have been engaged in screen printing technology for 13 years and have accumulated some experience. These experiences are now introduced to comrades in the industry for reference.

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