光缆线路故障的四大原因
The optical cable is mainly composed of optical fiber, plastic protective sleeve and plastic outer skin. There is no metal such as gold, silver, copper and aluminum in the optical cable. 光线电缆的基本结构通常由电缆芯组成, 加固钢丝, 填充物和护套, ETC. 此外, there are waterproof … 阅读更多