 |
| |||
| ground contact | |||
| 地面 接 触: 13 phrases in 8 subjects |
| Agriculture | 1 |
| Athletics | 3 |
| Automobiles | 1 |
| Aviation | 2 |
| Bridge construction | 1 |
| Economy | 1 |
| Sports | 1 |
| Technology | 3 |
|
| |||
| ground contact | |||
| 地面 接 触: 13 phrases in 8 subjects |
| Agriculture | 1 |
| Athletics | 3 |
| Automobiles | 1 |
| Aviation | 2 |
| Bridge construction | 1 |
| Economy | 1 |
| Sports | 1 |
| Technology | 3 |