Hellow guys, Welcome to my website, and you are watching 여름맞이! 에어컨과 살충제의 탄생 이야기 [#과학다반사] / YTN 사이언스. and this vIdeo is uploaded by YTN 사이언스 at 2021-07-11T23:56:51-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
