| |||
pedestrian subway | |||
pedestrian tunnel | |||
passenger subway; subway for pedestrians |
行 人 地道 : 28 phrases in 8 subjects |
Architecture | 1 |
Aviation | 1 |
Bridge construction | 4 |
Electronics | 1 |
General | 1 |
Hydroelectric power stations | 1 |
Space | 1 |
Technology | 18 |