| http://www.w3.org/ns/prov#value | - A ball that has lots of topspin and bounces around the height of your shoulders but does not feel heavy on your racquet is NOT a heavy ball.A ball with so called 'Heavy' topspin and a loopy trajectory is not a heavy ball unless it feels heavy on your racquet.So called 'Heavy' topspin is a characteristic of many genuinely heavy balls, but does not itself qualify a ball as heavy, only a heavy sensati
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