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 
屏边| 盐边县| 泰安市| 定边县| 罗山县| 合江县| 灌阳县| 五家渠市| 镇康县| 乾安县| 西乌| 台山市| 修武县| 新余市| 环江| 宝山区| 林口县| 疏附县| 资中县| 昔阳县| 双桥区| 香港 | 壤塘县| 彰武县| 永吉县| 县级市| 建水县| 山东省| 安龙县| 伊川县| 娱乐| 铜川市| 广德县| 运城市| 江山市| 清镇市| 仙居县| 天峻县| 斗六市| 绵阳市| 吴桥县|