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YoungMu Jeon @UCQdyEiNS46h3SG7psUqYv2g@youtube.com

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00:14
λͺ¨λ‚˜λ¦¬μžμ— μˆ¨κ²¨μ§„ ν”Όλ³΄λ‚˜μΉ˜ μˆ˜μ—΄
00:12
μ˜μ›νžˆ λ‹¬λ¦¬λŠ” μ „μžμ„ κΈ°μ°¨ (Endless-running magnet train)