But the Thames tunnel is ahistorical milestone in tunnel engineering.
但是，泰晤士河隧道是隧道工程历史上的一座里程碑。
Shields that are modification of the one that Brunel developed for boring the Thames Tunnel are used in excavating through clay or soft rock.
布鲁内尔在挖掘泰晤士河隧道时所发明的盾构加以改进后用于在粘土和软岩地带挖掘隧道。
Shields that are modification of the one that Brunel developed for boring the Thames Tunnel are used in excavating through clay or soft rock.
布鲁内尔在挖掘泰晤士河隧道时所发明的盾构加以改进后用于在粘土和软岩地带挖掘隧道。
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