translation.en: After many years of bending gears with a pair of pliers, I made that tool, and then I made this other tool for sort of centering gears very quickly -- sort of developing my own little world of technology.
translation.zh: 有很多年我一直用钳子制作齿轮，在那之后 我发明了那个工具，后来又发明了另一个工具 为了更快的定位齿轮的中心 也是为了开创我的小小技术世界