hydrogen bubble
| method
| hydrogen bubble | |
| met. | 氢气泡 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 氢气泡 | |||
|
hydrogen bubble : 8 phrases in 4 subjects |
| Aviation | 1 |
| Earth sciences | 1 |
| Space | 1 |
| Technology | 5 |