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Tennis flight path

Wang Jiaying 12010-02-01 04:01:29 +0000 #1
tennis flying three-dimensional line, do not get the ball as a particle
wang11255552010-02-01 04:17:11 +0000 #2
side spin in general is a parabola, if there is a deflection of the
jody352010-02-01 04:34:17 +0000 #3
generally topspin backspin ball and straight oblique corner and the bottom line you can play the ball more advice I
lishiguao2010-02-01 04:37:09 +0000 #4
topspin, backspin, side spin. Is estimated that you say is the Hawk-Eye

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