| |||
| 复合分类 | |||
| 交叉分类; 多重分类 | |||
| 多重分组类 | |||
|
multiple classification : 10 phrases in 7 subjects |
| Air defense | 1 |
| Business | 2 |
| Earth sciences | 1 |
| Electronics | 1 |
| Reproductive biology | 1 |
| Space | 1 |
| Statistics | 3 |
| |||
| 复合分类 | |||
| 交叉分类; 多重分类 | |||
| 多重分组类 | |||
|
multiple classification : 10 phrases in 7 subjects |
| Air defense | 1 |
| Business | 2 |
| Earth sciences | 1 |
| Electronics | 1 |
| Reproductive biology | 1 |
| Space | 1 |
| Statistics | 3 |