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tunnel boring machine "bertha" successfully

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Tunnel boring machine - Wikipedia

The first successful tunnelling shield was developed by Sir Marc Isambard Brunel to excavate the Thames Tunnel in 1825. However, this was only the invention of the shield concept and did not involve the construction of a complete tunnel boring machine, the digging still having to be accomplished by the then standard excavation methods.

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Bertha (tunnel boring machine) - Wikipedia

Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and is the world's largest earth pressure balance tunnel boring machine, at a cutterhead diameter of 57.5 feet (17.5 m) across.

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Elon Musk posts sensual Instagram picture with Boring Company ...

On Friday Elon Musk posted a photo of himself on Instagram with one of the boring machines used by his tunneling business, the Boring Company.; The post's caption read, "Deep in the hole with my boring machine.

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Elon Musk tweets photo of his giant tunnel boring machine. e-mail; ... China successfully tests its hypersonic Starry Sky-2 aircraft that will fire nuclear missiles ...

Herrenknecht - Official Site

Herrenknecht is the world market leader in mechanized tunnelling technology and offers high quality tunnel boring machines for ... from Herrenknecht – successful in ...

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