underground bases

Message posted by darkhorse on December 08, 2002 at 18:30:43 PST:

long while back a posting said that if there were underground bases they would need a large extraction of dirt. This is good unless you go put into effect the issue of usaf nuclear tunneling machines that melt the rock and use the extractions to make the walls of the tunnel.

Attached link: http://www.detailshere.com/tunnelmachine.htm


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