九九热精,久久久穴,久久美女视频,91国自产精品中文字幕亚洲午夜,国产精品久久久久久夜夜夜夜,二区视频在线,久久国产精品系列

  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 
平安县| 抚顺县| 大兴区| 兴海县| 广西| 泌阳县| 从江县| 吐鲁番市| 乡城县| 蒙山县| 扎鲁特旗| 邹平县| 宜都市| 英山县| 广灵县| 左权县| 景泰县| 安阳县| 筠连县| 乌拉特前旗| 伽师县| 安国市| 桐梓县| 确山县| 彝良县| 潢川县| 防城港市| 兴隆县| 姚安县| 醴陵市| 潼南县| 定襄县| 合水县| 湛江市| 工布江达县| 湄潭县| 龙南县| 平度市| 阿拉善盟| 浦县| 清水河县|