null depth
| of
| difference pattern
| null depth | |
| tech. | 零位深度 |
| of | |
| gen. | 的; …的; 关于 …的; …做成 的; 对…; … 的 |
| difference pattern | |
| space | 差方向图 |
| |||
| 零位深度 | |||
|
null depth : 6 phrases in 4 subjects |
| Air defense | 1 |
| Aviation | 2 |
| Electronics | 1 |
| Space | 2 |