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。) D8 w3 n0 Z f d
2 spilt the heavier side ping pongs in half and weight against each othertvb now,tvbnow,bttvb2 T% n8 y, t; v& C8 I9 I; X: g
3 weiht either ping pongs one on one then you will know which is the heavy one. |