 |
| |||
| 形件; 三通管 | |||
| T-pipe T: 25 phrases in 8 subjects |
| Architecture | 2 |
| Automobiles | 4 |
| Construction | 1 |
| Ecology | 1 |
| Electric machinery | 1 |
| General | 3 |
| Hydroelectric power stations | 5 |
| Technology | 8 |
|
| |||
| 形件; 三通管 | |||
| T-pipe T: 25 phrases in 8 subjects |
| Architecture | 2 |
| Automobiles | 4 |
| Construction | 1 |
| Ecology | 1 |
| Electric machinery | 1 |
| General | 3 |
| Hydroelectric power stations | 5 |
| Technology | 8 |