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| 径节制 | |||
| 调桨系统 | |||
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| 变桨距系统 | |||
| pitch system: 30 phrases in 7 subjects |
| Aviation | 14 |
| Electronics | 3 |
| Mountaineering | 1 |
| Nautical | 1 |
| Space | 3 |
| Technology | 5 |
| Wind Energy | 3 |
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