The Square Wheel Runs Faster Than The Round Wheel, So It's True!

Must the wheel be round? Do round wheels always run the fastest? A few years ago, when we are still the "Round wheel is the ultimate design" For the truth, an inventor named david patrick broke the routine, invented a strange-looking "Shark wheel. And it has been proven that on the ground with friction, "Shark wheel" Than the traditional round wheel rolling faster.

It Is Necessary To Play Handsome, Without It How To Play On The Court?

I have been playing soccer for more than 6 years, in my opinion, our country's amateur soccer field, because of the poor quality of the turf, in addition to tf (broken nail) spikes, wearing other spikes are like "On stilts". It is easy to slip, not to mention that, like soccer, such a fierce confrontation, fast walking and stopping sports, the choice of improper spikes, is irreversible damage to the knee.
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