All This Is That
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Showing posts with label
Bertha
.
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Showing posts with label
Bertha
.
Show all posts
Tuesday, April 04, 2017
Seattle's massive tunneling machine, Bertha, breaks through the wall
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The (formerly) world's largest tunnel-drill machine Bertha broke through its final rock just before 11:30 a.m. today (after years of...
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