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Tennis how old raw rubber pull the ball into the net? ? ?

492,061,3682010-02-11 09:01:59 +0000 #1

Dream blurred2010-02-11 09:06:34 +0000 #2
pull the ball when the elevation point of board ---
xuziyang32010-02-11 09:12:50 +0000 #3
because the raw rubber they simply can not pull the ball

he had no friction
order to optimize the game to be proud of2010-02-11 09:27:59 +0000 #4
the characteristics of rubber particles is hitting sink (professional athletes also have poor state of the net phenomenon)

If you are the original play is anti-adhesive, not a change of course, if the net

can be appropriately strengthened to reduce friction

raw rubber shock strengths is the speed

Of course, theory is one thing to practice is one thing, it is recommended to take more than what ball machine practice balls



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