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| 研究海流用声脉冲发送器; 浅穿透高功率换能器 | |||
| 弹上音响信标 | |||
| 声脉冲发射装置; 声信号发生器 | |||
| 声波发射器 | |||
| 音响信标; 脉冲定深器; 水声测位仪; 声脉冲发射器 | |||
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pinger : 9 phrases in 5 subjects |
| Construction | 2 |
| Engineering geology | 1 |
| Geophysics | 1 |
| Oil / petroleum | 1 |
| Technology | 4 |
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