Stressfree

1   weight 6 ping pongs with another 6 ping pongs. see which side is heavier
: M6 o7 U. j7 V5 H9 k/ G2   spilt the heavier side ping pongs in half and weight against each other
: u* ^+ I3 `8 o7 U- C  UTVBNOW 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   weiht either ping pongs one on one then you will know which is the heavy one.