| 21. | The French side used five tunnel boring machines ( TBMs ), the English side six.
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| 22. | Tunnel boring machines will be used for the construction.
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| 23. | Boring machines use twist auger bits usually ranging in size from inch to 2 inches.
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| 24. | Both tunnel-boring machines were scheduled to finish the required tunneling in the spring of 2010.
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| 25. | The tunnel boring machine was longer than a football field at long, and over in diameter.
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| 26. | Soilmec manufactures drilling machinery to be used in the construction of cranes and tunnel boring machines.
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| 27. | As well as cannon, the smooth bore machine could make cylinders for Watt to make the cylinders.
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| 28. | The tunnel boring machine began work in November 2011 and completed the second tunnel in May 2013.
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| 29. | Tunnel-boring machines ( TBM ) were brought to help speed up the excavation of the remaining tunnels.
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| 30. | He developed a series of increasingly precise horizontal boring machines which culminated in the " JIGMIL ".
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