Hellow guys, Welcome to my website, and you are watching 가스기능사 필기 인강 및 핵심강의노트와 기출문제 교재 책 소개 ㅣ홍까스ㅣ에듀피디. and this vIdeo is uploaded by 에듀피디 at 2022-07-03T19:13:16-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.