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。6 Q3 E& V& G" e; v- i
2 spilt the heavier side ping pongs in half and weight against each othertvb now,tvbnow,bttvb2 ?5 g* v. a6 ~, F4 w; X
3 weiht either ping pongs one on one then you will know which is the heavy one. |