Hello guys, Welcome to Africa's Largest Video Search Engine, and you are watching 나에게 4차 산업혁명이란?. and this video is uploaded by 과학기술정보통신부 at 2017-04-03T18:05:45-07:00. We are just promoting this video only for entertainment and educational purpose only. I hop you like our Video Search Engine. [je-vSqfTbDo]
