The Moment A Massive Tunnel Borer Breaks Through At The End Of A Tunnel
April 14, 2017 ・0 comments ・Topic： trending Upcoming
The Moment A Massive Tunnel Borer Breaks Through At The End Of A Tunnel
Bertha, one of the world's largest tunnel boring machines, has been toiling underneath Seattle for years (with some unplanned delays)
April 14, 2017 at 06:02PM
via atn https://www.youtube.com/watch?utm_source=ifttt&v=sLum1jxW1ls
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