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| 声波分析探伤仪; 声频故障仪 | |||
| 声波分析器 | |||
| 声波探伤仪 | |||
| 声波分析仪 | |||
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sonic analyzer : 8 phrases in 5 subjects |
| Air defense | 1 |
| Electronics | 2 |
| General | 1 |
| Geophysics | 1 |
| Technology | 3 |
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