1. Kev qhia kov tag nrho-hauv-ib lub tshuab yog qhov pib zoo ib yam li cov khoos phis tawj dav dav hauv cov txheej txheem siv.Vdink digital whiteboard smart board digital smart board rau chav kawm.
2. Lub kov tag nrho-hauv-ib lub tshuab siv lub thawv kov raws li cov khoom siv nkagVdink digital whiteboard ntse board digital ntse board rau chav kawm
3. Kov tag nrho-hauv-ib qho thiab ntau tus ntiv tes ua haujlwm tsis tuaj yeem ua tiav los ntawm cov keyboard thiab nas cov khoom sivVdink digital whiteboard smart board digital smart board rau chav kawm

2022.06.30