Various rubber compounds and glues are applied on the rackets to impart greater spin or speed, indeed, some glues are banned from Olympic competition -- they make the ball travel up to 30km/h faster.

 
  • 各种各样的橡胶化合物和粘合剂被用在球拍上,以便于提高速度和球的旋转性能。实际上,奥运会上禁止使用某些粘合剂,因为那些材料可以使球的时速再提高30公里。
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