How to determine reasonable subsea tunnel rock cover depth is still an intractable research subject.

合理确定隧道顶板厚度是地下工程中一个亟待研究解决的课题。

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How to determine reasonable subsea tunnel rock cover depth is still an intractable research subject.

合理确定隧道顶板厚度是地下工程中一个亟待研究解决的课题。

youdao