 |
| |||
| 隐藏面 | |||
| 隐藏面; 非显见面 | |||
| hidden surface: 7 phrases in 6 subjects |
| Agriculture | 1 |
| Bridge construction | 1 |
| Electronics | 1 |
| Technology | 2 |
| Telecommunications | 1 |
| Textile industry | 1 |
|
| |||
| 隐藏面 | |||
| 隐藏面; 非显见面 | |||
| hidden surface: 7 phrases in 6 subjects |
| Agriculture | 1 |
| Bridge construction | 1 |
| Electronics | 1 |
| Technology | 2 |
| Telecommunications | 1 |
| Textile industry | 1 |