| |||
| 归零标志 | |||
| 归零标记 | |||
| |||
| 归零标志 | |||
|
return-to-zero mark : 8 phrases in 5 subjects |
| Aviation | 1 |
| Electronics | 1 |
| Information technology | 1 |
| Space | 3 |
| Technology | 2 |
| |||
| 归零标志 | |||
| 归零标记 | |||
| |||
| 归零标志 | |||
|
return-to-zero mark : 8 phrases in 5 subjects |
| Aviation | 1 |
| Electronics | 1 |
| Information technology | 1 |
| Space | 3 |
| Technology | 2 |