Vdink hluav taws xob whiteboard high-precision 20-point kov, qhov tseeb kov yog siab li ± 1mm, thiab kev sau ntawv thiab kev nthuav qhia zoo dua. Txhawm rau tiv thaiv lub teeb refraction los ntawm kev cuam tshuam cov nyhuv ntawm cov duab, tsis muaj kev nthuav dav hauv daim duab ploj lawm. Nyob rau tib lub sijhawm, tus neeg siv kov lub tshuab hluav taws xob whiteboard los sau ntau dua, thiab tus cwj mem yog qhov tseeb dua, uas tuaj yeem kho qhov kev sau ntawv tiag tiag.

2021.12.28