 |
| 作用中心: 23 phrases in 15 subjects |
| Agriculture | 3 |
| Automobiles | 1 |
| Aviation | 5 |
| Bridge construction | 1 |
| Business | 1 |
| Earth sciences | 1 |
| Economy | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| General | 1 |
| Name of organization | 1 |
| Space | 3 |
| Sports | 1 |
| Technology | 1 |
| United States | 1 |
|
| 作用中心: 23 phrases in 15 subjects |
| Agriculture | 3 |
| Automobiles | 1 |
| Aviation | 5 |
| Bridge construction | 1 |
| Business | 1 |
| Earth sciences | 1 |
| Economy | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| General | 1 |
| Name of organization | 1 |
| Space | 3 |
| Sports | 1 |
| Technology | 1 |
| United States | 1 |