 |
| |||
| 源泉; 前倒缆; 起源; 水源 | |||
| head spring: 15 phrases in 4 subjects |
| Automobiles | 1 |
| Hydroelectric power stations | 5 |
| Rail transport | 1 |
| Technology | 8 |
|
| |||
| 源泉; 前倒缆; 起源; 水源 | |||
| head spring: 15 phrases in 4 subjects |
| Automobiles | 1 |
| Hydroelectric power stations | 5 |
| Rail transport | 1 |
| Technology | 8 |