日日摸天天摸爽爽狠狠97_国产精品美女WWW爽爽爽视频_国产亚洲午夜精品a一区二区_国产传媒18精品A片熟女_日日摸夜夜添无码AVA片_国产自制一区_台湾swag网站_精品乱码一卡2卡三卡4卡网_啦啦啦在线播放视频_伊人这里只有精品_日本一本免费线观看视频_日本三级在免费2017_三级黄色片_两个人的BD高清在线观看视频_国产视频网_国产精成人品观看_97爱.com_禁断の肉体乱爱中文字幕_天天草天天_日本无码一区人妻免费视频

  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 
主站蜘蛛池模板： 泾源县| 拉萨市| 广德县| 慈溪市| 天镇县| 福海县| 江北区| 海林市| 区。| 张北县| 建水县| 凤台县| 台北县| 监利县| 平山县| 罗田县| 墨江| 连州市| 阿巴嘎旗| 个旧市| 汤原县| 叙永县| 盐山县| 丰城市| 谢通门县| 舒兰市| 柳江县| 东丽区| 长汀县| 兴义市| 昌平区| 长丰县| 化州市| 泾阳县| 元江| 崇明县| 义马市| 正安县| 金昌市| 东乌| 博野县|