- subaqueous tunnel
- tunnel, subagueous
- tunnel, submarine
- underwater tunnel
- 水底: water bottom; bed
- 隧道: tunnel; tunneling; tunnellin ...
- 水底隧道工程: subaqueous tunneling
- 底隧道: chunnel
- 海底隧道: cross-harbour tunnel; eastern harbour crossing; submarine tunnel; undersea tunnel
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