- 帖子： 11
- 注册时间： 2018-03-25, 12:36
The badminton shuttlecock has been used for thousands of years. Everyday badminton players use plastic shuttlecocks, while serious players use feathered ones. Feathers must be a specific size and have a precise angle to them. If a machine with 26 sensors can't measure the exact degree of the feather, workers must manually do so with a specially calibrated chart. The process has many steps from then on, all taking into consideration feathers' angle and the shuttlecocks overall balance.
分享按钮新浪微博 | 微信 | QQ空间 | 腾讯微博 | Facebook | 推荐
正浏览此版面之用户： 没有注册用户 和 461 访客