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| 水声监视系统 (美国海军在某些海域，如格陵兰、冰岛、英国之间海底部署的水听器阵列); 声音监控系统 | |||
| 音响监听系统; 水声监听系统 | |||
| 声音监测系统 | |||
| 水下声响监视系统 | |||
| sound surveillance system: 1 phrase in 1 subject |
| Aviation | 1 |
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