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。/ q) Z8 l4 r. i* q
2 spilt the heavier side ping pongs in half and weight against each othertvb now,tvbnow,bttvb! m, q6 Q1 f7 F0 l
3 weiht either ping pongs one on one then you will know which is the heavy one. |