1 weight 6 ping pongs with another 6 ping pongs. see which side is heavierTVBNOW 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。; _, L7 M. B# w
2 spilt the heavier side ping pongs in half and weight against each other公仔箱論壇, l$ ]. V, ]$ {$ K: @( H- ^
3 weiht either ping pongs one on one then you will know which is the heavy one. |