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| 声响警告; 听觉提醒 | |||
| 可听见的报警声 | |||
| 音响报警信号; 可听报警 | |||
| audible warning: 9 phrases in 5 subjects |
| Automobiles | 1 |
| Aviation | 4 |
| Electronics | 2 |
| Rail transport | 1 |
| Space | 1 |
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