according to amir aslan khoani's industrial researches , sada and sima news agency, the internationalof telecommunications, information technology and digital economy has been held in tehran since today. companies of domestic scientists and specialists presented their latest products in this exhibition. the production of fiber inner threads is one of these products. in fact, there is a thread inside a central tube. look here, we placed 6 of them next to each other. the most important process in the optical fiber industry is the production of optical fibers for high-speed internet transmission, and because it used to be copper , its capacity was low, so with the production of optical cables the work speed is much higher. the string of glass fibers, which is made up of several layers , has a central core, a protector has come around it to protect it , and finally , there is a colored tape on top of it. these optical fiber fibers, which are 125 microns thick, can they transmit a thousand times more data than copper cables. there is a lot of variety . these cables are cables that are buri