| |||
underground structure | |||
infrastructure; subsurface structure | |||
substructure; substruction | |||
buried structure (物); substructure (物); subsurface structure (物); underground structure (物) |
地下 结 构 : 14 phrases in 3 subjects |
Engineering geology | 4 |
Explosives and Explosive Ordnance Disposal | 1 |
Technology | 9 |