Not just counting, but saving lives: Curta

The thing I have in my hand is called Curta. It can calculate very well. I have talked about it twice in a row, but in fact, it can save lives and save the lives of the people who invented it.
Hello everyone, I'm your "Encyclopedia Uncle" Uncle Rocket~
Talk about interesting science and teach interesting makers!
Through the description of natural science and social science knowledge, outline the overall outline of the scientific knowledge picture!
Want to know more knowledge, all in [Science Rocket Uncle]
-------------------------------------------------- -------------------------------
Subscribe me if you like me, don't forget to click the little bell 🔔 Your support is precious to me! 💨
kexuehuojiansh...