User:서울교통공사 4호선 451편성
 | This account is a suspected sockpuppet of 백돌 (talk · contribs · logs) and has been blocked indefinitely as well as locked globally. Please refer to the sockpuppet investigation of the sockpuppeteer, and editing habits or contributions of the sockpuppet for evidence. This policy subsection may be helpful. Account information: block log – contribs – logs – abuse log – CentralAuth |  |