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・ Tunstall High School
・ Tunstall Hills
・ Tunstall Priory
・ Tunstall Quarles
・ Tunstall railway station
・ Tunstall Reservoir
・ Tunstall Road
・ Tunstall v Steigmann
・ Tunnel fin
・ Tunnel finisher
・ Tunnel Hill
・ Tunnel Hill State Trail
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Tunnel hole-through
・ Tunnel hull
・ Tunnel in the Sky
・ Tunnel injection
・ Tunnel ionization
・ Tunnel junction
・ Tunnel magnetoresistance
・ Tunnel Maurice-Lemaire
・ Tunnel Mill
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・ Tunnel of Death
・ Tunnel of Eupalinos


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Tunnel hole-through : ウィキペディア英語版
Tunnel hole-through

Tunnel hole-through, also called breakthrough, is the time, during the construction of a tunnel built from both ends, when the ends meet, and the accuracy of the survey work becomes evident. Many tunnels report breakthroughs with an error of only a few inches.
== See also ==

* Cascade Tunnel
* Blue Ridge Tunnel -
* Blue Ridge Tunnel - - 1944

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Tunnel hole-through」の詳細全文を読む



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