tunnelern.隧道掘进机tunneln.隧道；地道；洞穴v.挖地道；挖隧道tunnel cryotron隧道式冷子管tunnel windings隧道绕组tunneling index掘进参数tunnel emission隧道发射Tunnel modeling隧道建模tunnel coverage遂道覆盖Tunnel Spectrum隧道谱tunnel planning通道规划tunnel in loess黄土隧道tunnel protocol隧道协议

1. The preliminary thickness of the subsea tunnel rock cover was determined through using project analogy method.
   根据国内外已建成的海底隧道资料，采用工程类比方法初步确定象山港海底隧道的最小岩石覆盖厚度。