Tianlong 80 1 cement is round in three days, and plastic is round in one week! Don't buy it! Don't buy it! Don't buy it! Don't buy such cheap things! You get what you pay for! 2. Tianlong 603 is more durable than Tianlong 80 1. Moderate elasticity, moderate hardness, the disadvantage is that it is not resistant to beating. It has been used in school tennis competitions. After three innings, the hairball turned into a magical turn! How fast you play! The opponent's topspin is intoxicating! 3. The rise of Tianlong is characteristic of brain-strengthening! This is difficult because it is a stress-free ball! In fact, it is not recommended for beginners to play! Because there is no force! It's easy to shoot a flat ball! Industry conscience is a normal state. Personally, I feel that I am not training for the exquisite brand odear, dd2. Dd 1 and double data rate 2) 1 Gigabit memory chip and Draco feel that at 603, Longsheng is close, but dd 1 has a lot of resistance compared with 603, which is much higher than soft 5- double data rate 2) 1 Gigabit. Schlesinger! This is my best feeling about the ball. It feels very soft. With a little vibration and pressure behind the ball, the ball can be practiced. After the pressure is applied slowly, the light ball will not hurt the wrist (OS: not as elastic as the children's ball). There is a huge old tin package in history (right). The teacher hoarded goods and gave me a bucket ... so ... I discovered black technology again. The ball is completely balanced under pressure. More comfortable than any training ball I have ever played! (In contrast, it's a little greener than the new slye ... I don't want to write ATP President Wilson US Open Wilson Australian Open. Many people use this popular style. (Not suitable for training ball, low cost performance. From the price point of view, please ignore me ...)

exceed