https://blog.wongcw.com/2021/06/09/relativity-space%e7%9a%84%e5%8f%af%e9%87%8d%e8%a4%87%e4%bd%bf%e7%94%a8%e7%81%ab%e7%ae%ad%e5%8f%af%e5%9c%a860%e5%a4%a9%e5%85%a7%e9%80%9a%e9%81%8e3d%e6%89%93%e5%8d%b0%e5%ae%8c%e6%88%90/
Relativity Space的可重複使用火箭可在60天內通過3D打印完成