Thought this video of how a particular brand of tunnel boring machines works was interesting, especially in light of so much DUMBS discussion in the news and here:
Click to view: https://www.youtube.com/watch?v=MuYdnzcQXhk
Thought this video of how a particular brand of tunnel boring machines works was interesting, especially in light of so much DUMBS discussion in the news and here:
Click to view: https://www.youtube.com/watch?v=MuYdnzcQXhk
@Soretna , the nuclear powered "subterrene" tunnel boring machines have somehow been kept secret for the last 4 decades :))
Regards