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put 3 balls on each side, tvb now,tvbnow,bttvb" J. E& L, F5 j% c6 e9 `, l
if balance, we can prove that all 6 balls on the 天平 is normal, TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。: [3 i$ g) U6 G/ \- m& R2 S
if not balance, we can prove that the 6 balls outside the 天平 is normal.4 |  z! |6 a6 L1 e1 X
then use the proved-normal ball on one side and put the other ball on other side
: y, T' ^1 P: d. `# A, \5.39.217.77:8898to determine the abnormal is heavy and light