国产99久,久久久久久久久久一区,欧美国产精品久久久久久免费,亚洲国产精品久久久久久久久久久,99久久久国产精品,国产精品久久久久av福利动漫,国产欧精精久久久久久久

  1. Telephone cable transmission distance

    In our general construction process, we do not consider the transmission distance of large logarithmic local telephone cables and ordinary telephone lin...

  2. What problems should we pay attention to when transporting electric wires and cables?

    Wire and cable products need to go through a certain process of transportation and storage from the factory to delivery to the user. During this period,...

  3. Attention points in the application of wire and cable products?

    1, sprain, pull cable in the installation process, should use the wire release frame, otherwise it is easy to cause twisting and twisting cable sprain a...

  4. Why do flame retardant cable products burn when lit with lighters?

    First of all, the definition of flame retardant cable is: flame retardant cable, cable with specified flame retardant properties (including flame retard...

  5. Excuse me, what is the difference between your outdoor network cable and indoor network cable?

    The outer sheath of outdoor network cable is PE (polyethylene), which has the characteristics of corrosion resistance and ultraviolet resistance. The ou...

  6. Why to discover indoor 4 core fiber optic cable construction to be able to be like after finishing f

    Because in the construction process, the cable sheath is pulled when threading, and the tension is too large. When the construction is completed, the sh...

  7. Why does the GYXTW outdoor optical cable only produce less than 12 cores?

    GYXTW is a central beam tube type, that is, there is only one loose sleeve in the middle. According to the national standard on the color of fiber core,...

  8. If distinguish module 90 degrees and 180 degrees IDC line?

    The Angle formed by the direction of the crystal head insertion module and the direction of the wire cutter is used to distinguish. The speech module an...

  9. How to distinguish indoor optical cable from color?

    Yellow represents single-mode optical cable; Orange represents multimode optical cable; Some manufacturers use blue to represent multi - mode million op...

  10. What is the transmission distance of multimode optical cable in gigabit network?

    A1a (50/125um) class multi-mode fiber has a transmission distance of 550 meters; A1b (62.5/125um) class multimode fiber has a transmission distance of 2...
15 records 1/2 page next page  1  2 
连城县| 上栗县| 鄂托克前旗| 松江区| 黑水县| 长子县| 广西| 奈曼旗| 锦州市| 洞口县| 卢湾区| 古浪县| 章丘市| 同心县| 通城县| 濮阳市| 宕昌县| 宝鸡市| 历史| 建湖县| 泰宁县| 铜鼓县| 浙江省| 辉县市| 阿城市| 榆中县| 巴中市| 清水县| 洛宁县| 呼和浩特市| 达州市| 綦江县| 镇赉县| 巴林左旗| 吉林省| 洞口县| 连山| 清河县| 望谟县| 武宁县| 自贡市|