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Figure eight fiber optic cable is built with the aid of using setting a single-mode or multi-mode fiber right into a free sleeve manufactured from excessive modulus plastic and full of a water-blockading compound. The middle of the middle is a metallic reinforcement middle.The unfastened tubing (and filler rope) is twisted across the middle reinforcement middle to shape a compact and spherical middle, with the gaps withinside the middle full of a water-blocking off filler. The cable core is wrapped longitudinally with steel-plastic composite tape and placed in parallel with the steel strand while squeezing the 8 letter sheath into the cable.