| |||
wye track; Y-track | |||
| |||
Y-track | |||
| |||
Y-trach | |||
wye track | |||
| |||
wye track | |||
| |||
U-rail |
形 轨道 : 54 phrases in 13 subjects |
Architecture | 1 |
Chemistry | 1 |
Earth sciences | 1 |
Electronics | 1 |
General | 3 |
Hydroelectric power stations | 2 |
Life sciences | 1 |
Metallurgy | 1 |
Nuclear and fusion power | 1 |
Oil / petroleum | 1 |
Rail transport | 1 |
Space | 13 |
Technology | 27 |