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1. | Dynamic Signal Analysis & Apparatus |
| 动态信号分析与仪器 |
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2. | signal testing apparatus |
| 信号测试设备 |
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3. | auto-distress signal apparatus |
| 自动报警信号接收机 |
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4. | call signal apparatus |
| 呼号机 |
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5. | signal sighting apparatus |
| 信号瞄准器 |
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6. | video signal generating apparatus |
| 视频信号发生器 |
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7. | signal measuring apparatus |
| 信号测量器 |
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8. | emit a single short high-pitched signal, as of apparatus. |
| 像仪器一样发出单一的短的信号。 |
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