Anefficient way to build a small tunnel
An efficient way to build a small tunnel
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Saturday, January 23, 2021
Nikola Tesla
I do not think you can name many great inventions that have been made by married men
Albert Einstein
Imagination is more important than knowledge.
Here is the source video, showing the entire procedure: https://www.youtube.com/watch?v=LoRIztYmWjY&feature=youtu.be
Dat keystone!!