passive gamma ray
| method
| passive gamma ray | |
| oil | 无源伽马射线 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 无源伽马射线 | |||
|
passive gamma ray : 7 phrases in 3 subjects |
| Chemistry | 4 |
| Nuclear physics | 2 |
| Technology | 1 |