| |||
| 防护因数【核】; 防护因子 | |||
| 保护因数 | |||
| 防护指数; 防护系数 | |||
|
Protection Factor : 7 phrases in 6 subjects |
| Air defense | 1 |
| Desert science | 1 |
| Electricity | 1 |
| Hydroelectric power stations | 1 |
| Space | 1 |
| Textile industry | 2 |
| |||
| 防护因数【核】; 防护因子 | |||
| 保护因数 | |||
| 防护指数; 防护系数 | |||
|
Protection Factor : 7 phrases in 6 subjects |
| Air defense | 1 |
| Desert science | 1 |
| Electricity | 1 |
| Hydroelectric power stations | 1 |
| Space | 1 |
| Textile industry | 2 |