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| 螺旋桨式流速仪 | |||
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| 螺旋桨式流速仪 | |||
| 旋桨式流速仪 | |||
| 旋桨式流速计 | |||
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propeller current-meter : 8 phrases in 4 subjects |
| Aviation | 1 |
| Electronics | 1 |
| Hydrology | 1 |
| Technology | 5 |
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