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| 上面级; 上一阶段 | |||
| 多级火箭的上面级; 末级; 顶级; 上面级 (火箭) | |||
| 前期 | |||
| upper stage: 38 phrases in 8 subjects |
| Aviation | 3 |
| Ecology | 1 |
| Electronics | 1 |
| Hydraulics | 1 |
| Oil / petroleum | 1 |
| Space | 27 |
| Technology | 1 |
| United States | 3 |
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