Hellow guys, Welcome to my website, and you are watching [중2과학]Ⅰ.물질의 구성 - 4.이온. and this vIdeo is uploaded by 과학교사K at 2021-03-03T15:15:04-08:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
