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| 行频每秒扫描行数 | |||
| 工业频率 | |||
| 行扫描频率 | |||
| 行频; 行频率; 线路频率; 工频 | |||
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| 工频; 工业频率 | |||
| 线路行扫描频率 | |||
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line frequency : 58 phrases in 13 subjects |
| Air defense | 2 |
| Communications | 3 |
| Compressors | 1 |
| Construction | 1 |
| Electric machinery | 1 |
| Electronics | 13 |
| General | 6 |
| Geophysics | 2 |
| Metallurgy | 4 |
| Physics | 2 |
| Steel production | 1 |
| Technology | 14 |
| Telecommunications | 8 |
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