Dab tsi ntawm qhov chaw koj tuaj yeem siv whiteboard markers rau?

Whiteboard markers yog hom cwj mem tshwj xeeb tsim los siv rau ntawm qhov chaw tsis muaj qhov ntxeem tau zoo li whiteboards, iav. Cov cim no muaj cov cwj mem qhuav qhuav uas tuaj yeem yooj yim so nrog daim ntaub qhuav lossis cov lwv, ua rau lawv zoo tagnrho rau kev sau ntawv ib ntus.