 |
| tunnel m | |
| environ. | 隧道 (地下通道，特别是为火车或汽车穿过山，河流或拥挤的市区而设的。) |
| forestr. | 地洞 |
| hydrol. | 明渠 |
| "tunnel" m | |
| IMF. | 两头封; 上下限 |
| tunnel: 11 phrases in 9 subjects |
| Computer networks | 1 |
| Hydrology | 1 |
| Medical | 1 |
| Semiconductors | 2 |
| Superconductivity | 1 |
| Technology | 2 |
| Thermal Energy | 1 |
| Transport | 1 |
| Wood processing | 1 |