The stranded non-metallic air-blowing micro cable is made of a 250μm single-mode or multi-mode optical fiber sheathed in a loose tube made of high modulus material, and the tube is filled with non-toxic and harmless waterproof compounds. The center of the cable core is a non-metallic reinforcing core (FRP), and the loose tube (or filling rope) is twisted around the central reinforcing core to form a compact round cable core. A layer of water-blocking yarn is added to the reinforcing core, and then a black or colored high-density polyethylene (HDPE) sheath is extruded to form a cable.
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