[화제] 천리안위성 2B호

LINK : https://search.naver.com/search.naver?where=nexearch&sm=tab_htk.nws&ie=utf8&query=%EC%B2%9C%EB%A6%AC%EC%95%88%EC%9C%84%EC%84%B1+2B%ED%98%B8