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 
昔阳县| 武城县| 太原市| 朝阳县| 鄂尔多斯市| 新巴尔虎左旗| 平阳县| 迁安市| 新干县| 嘉义县| 延安市| 阿巴嘎旗| 宣汉县| 武定县| 南投县| 淮阳县| 宁武县| 泸溪县| 宜阳县| 沧州市| 肇州县| 墨脱县| 疏勒县| 龙井市| 怀化市| 怀宁县| 苍南县| 富顺县| 沂南县| 奎屯市| 汽车| 莱阳市| 麟游县| 土默特左旗| 鹿泉市| 崇州市| 杨浦区| 阿拉善左旗| 汉中市| 循化| 五大连池市|