| |||
| 放射性同位素接近程度指示器; 电离辐射接近程度指示器 | |||
|
proximity indicator : 18 phrases in 9 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 4 |
| Electronics | 3 |
| General | 1 |
| Nuclear physics | 2 |
| Shipbuilding | 1 |
| Space | 2 |
| Technology | 3 |
| |||
| 放射性同位素接近程度指示器; 电离辐射接近程度指示器 | |||
|
proximity indicator : 18 phrases in 9 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 4 |
| Electronics | 3 |
| General | 1 |
| Nuclear physics | 2 |
| Shipbuilding | 1 |
| Space | 2 |
| Technology | 3 |