snail ball 연구 by 20615이준우 https://padlet.com/kyungans2520615/reqhy5vbxudldv2q en-us 2025-03-27 07:31:59 UTC 2025-03-27 07:38:54 UTC hello@padlet.com 과학전람회 kyungans2520615 https://padlet.com/kyungans2520615/reqhy5vbxudldv2q/wish/3384668533 2025-03-27 07:38:53 UTC https://padlet.com/kyungans2520615/reqhy5vbxudldv2q/wish/3384668533