Cylindrical Drilling Machine
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'Cylindrical Drilling Machine' - 1 News Result(s)
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One Of The World's Biggest Tunnels Was Hit By Sinkhole. Now, Progress
Bertha, one of the world's largest tunnel boring machines, emerged north of downtown Seattle on Tuesday shrouded in clouds of dust and chunks of falling concrete, completing the most difficult phase of a plan to build a highway under the heart of the city.
'Cylindrical Drilling Machine' - 1 News Result(s)
-
One Of The World's Biggest Tunnels Was Hit By Sinkhole. Now, Progress
Bertha, one of the world's largest tunnel boring machines, emerged north of downtown Seattle on Tuesday shrouded in clouds of dust and chunks of falling concrete, completing the most difficult phase of a plan to build a highway under the heart of the city.
