'땅 꺼짐' 반복되는데...지반 탐사 인력·장비 '태부족' / YTN YTN 0 13 09.17 05:12 https://www.youtube.com/watch?v=Qqm2IwkZr-Q + 1 https://www.youtube.com/feeds/videos.xml?channel_id=UChlgI3UHCOnwUGzWz… + 2 '땅 꺼짐' 반복되는데...지반 탐사 인력·장비 '태부족' / YTN