光时域反射器 通过对光传输信号在光缆中回传的散射信号进行分析判断光缆状况是光缆维护所必须的设备
The optical time domain reflectometer is an essential device for optical cable maintenance, which analyzes the scattered signals returned by the optical transmission signal in the optical cable to determine the condition of the optical cable
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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