 |
| |||
| 密度测量 | |||
| density measurement: 13 phrases in 8 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Space | 2 |
| Sports | 1 |
| Technology | 5 |
| United States | 1 |
|
| |||
| 密度测量 | |||
| density measurement: 13 phrases in 8 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Space | 2 |
| Sports | 1 |
| Technology | 5 |
| United States | 1 |