You are viewing a single comment's thread from:RE: [계량과측정 #5] 미세먼지관련 개념 정리View the full contextvirus707 (78)in #kr-science • 7 years ago !!! 힘찬 하루 보내요! https://steemit.com/kr/@mmcartoon-kr/5r5d5c 어마어마합니다!! 상금이 2억원!!!!!!