tunnel cave 中文意思是什麼
tunnel cave
解釋
天然隧洞-
Construction of a highway tunnel going through large scale karat cave
公路隧道通過大型溶洞群施工技術 -
The construction technologies of cave without top fill and tunnel gate
明洞和洞門工程施工技術; 4 -
The discussion on the technology of t - cave for twin - arch tunnel and middle separated wall
連拱隧道三導洞施工技術、中隔墻施工技術探討; 5
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