hydrogen/oxygen
| second stage
| hydrogen-oxygen | |
| avia. | 氢氧 |
| second stage | |
| auto. | 二级 |
| avia. | 第二级 |
| repr.biol. | 第二产程 |
| sport. | 第二阶段 |
| surg. | 第 II 期 |
| |||
| 氢氧 | |||
|
hydrogen/oxygen : 64 phrases in 16 subjects |
| Automobiles | 2 |
| Aviation | 3 |
| Business | 1 |
| Chemistry | 6 |
| Earth sciences | 2 |
| Ecology | 2 |
| Electronics | 4 |
| General | 4 |
| Geology | 1 |
| Materials science | 1 |
| Metallurgy | 1 |
| Oil processing plants | 1 |
| Scientific | 9 |
| Shipbuilding | 1 |
| Space | 17 |
| Technology | 9 |