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| 抛物线形柱面 | |||
| 抛物柱体; 抛物线形柱面; 抛物线筒柱 | |||
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| 抛物线形柱面 | |||
| 抛物柱面 | |||
| 抛物柱体; 抛物线形柱面; 抛物线筒柱 | |||
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parabolical cylinder : 8 phrases in 3 subjects |
| Air defense | 1 |
| Space | 1 |
| Technology | 6 |
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