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subaqueous sound ranging
| development
| installation
| subaqueous sound ranging | |
| el. | 水下声波测距 |
| development | |
| anim.husb. | 发育; 显影; 显层; 新设备; 成熟 |
| auto. | 发展改进 |
| installation | |
| gen. | 装置 |
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| 水下声波测距 | |||
| 水声测距 | |||
| subaqueous sound ranging: 4 phrases in 3 subjects |
| Electronics | 2 |
| General | 1 |
| Navigation | 1 |
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