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| 测速计; 转速检测器; 转速检测装置 | |||
| 转检测装置; 速度检测器; 测速装置 | |||
| speed detector: 5 phrases in 5 subjects |
| Earth sciences | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Space | 1 |
| Technology | 1 |
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