最近无缝球是炒的热热闹闹，一场无缝球的革命正在蔓延，到底乒乓球中无缝球和有缝球有什么区别和不同，一直都是我们期望知道的问题，下面来说说无缝球与有缝球的区别

  切开有缝球和无缝球，分开成两半，如图（白色是无缝球的所有部分的厚度差，黄色的是有缝球）。如图无缝球的每一个部分的厚度基本上是相同的，所以落点的准确度和弹跳均匀性更好。有缝球的厚度差异有三个部分，手腕和底部是非常大的，我们只是用手指按三个部分，可以明显感觉到其厚度差异。由于厚度的差异，相同的速度和不同部位的拍面与球接触时，其反弹方向，反弹的速度和反弹的力量是不同的，这会导致运动员对来球的曲线、方向、落点判断失误，然后导致不必要的错误和丢分。包括业余水平的乒乓球爱好者往往有这样的经验：他们的回球很有信心，然而球却莫名其妙地下网或是出台，这一现象的很大的原因是有风球的每部分受力不均匀，这一点已经由专业的高速摄像机捕捉球的运动曲线证明了。

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Cut separately Polyball and seam ball into two halves, and take a photo and attach the illustration of thickness difference on all parts of the balls (the white is seamless ball, the yellow is seam ball). From the photo, every part of the thickness of seamless ball is basically the same, so the accuracy of falling point and bounce uniformity are better. The thickness differences of seam ball on three parts - seam, wrist and bottom are very big, we just press the three parts by a finger and can obviously feel its thickness difference. Due to the thickness difference, when the ball with the same speed and different parts touch on table and racket, its rebound direction, rebound speed and rebound power are different, which cause the misjudgment of player on the curve, bounce height, falling point for the coming ball, then lead to unnecessary mistake and lose points. Including the players with amateur level often have such experiences: the ball they strike back with quite confidence to get score inexplicably drop to net or out of table. A big reason for this is the bounce inconformity on every part of the present seam ball. This point has been proved by the two experiments on bounce regularity of two types of balls taken by high-speed camera and falling point regularity tested by professional testing method.

  这篇关于无缝球与有缝球的区别希望能让大家更加清楚的认识这乒乓球的特点。

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