viewimage.php?no=24b0d769e1d32ca73dec87fa11d0283123a3619b5f9530e1a1316068e3dfca0ef438d009d6aff3b996c76230b1001f3d1340db332bae5c1d64c8d70432e8221fda1444bb8fb1c8342347339fbb54033e2049817644

종이 더러운건 죄송합니당..
안쪽 전하량 dv가 왜 4파이알제곱인가요? 4/3파이 알 세제곱아닌가용??