Britain and France are connected by an undersea tunnel.
英国和法国被一条海底隧道连接起来了。
The design technology-way of high-performance concrete mix-ratio projects used in second-level lining of Xiamen-xiang an undersea tunnel engineering is discussed.
阐述了厦门海底隧道衬砌高性能混凝土配合比方案的设计技术路线。
The design technology-way of high-performance concrete mix-ratio projects used in second-level lining of Xiamen-xiang an undersea tunnel engineering is discussed.
阐述了厦门海底隧道衬砌高性能混凝土配合比方案的设计技术路线。
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