| |||
| 悬垂绝缘子串 | |||
|
suspension string : 6 phrases in 4 subjects |
| Electric machinery | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 1 |
| Technology | 3 |
| |||
| 悬垂绝缘子串 | |||
|
suspension string : 6 phrases in 4 subjects |
| Electric machinery | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 1 |
| Technology | 3 |