明洞 (open cut tunnel) 指的是用明挖法修建的隧道。常用于地质不良路段 或埋深较浅的隧道。
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cut-type open cut tunnel 路堑式明洞
open-cut tunnel 明洞 ; 露天坑道
arch open cut tunnel 拱形明洞
anti-skid-type open cut tunnel 抗滑明洞
ingignment open cut tunnel 拱形明洞
structure open cut tunnel 拱形明洞
Hechuan open-cut tunnel 合川明洞
railway open cut tunnel 铁路明洞
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Transport Secretary Philip Hammond cut the ribbon to officially open the road tunnel, which has taken four and a half years to build.
BBC: Hindhead Tunnel
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