(Twisted pair structure: the cable insulation sheath is made of high-density polyethylene, the low-smoke halogen-free cable insulation sheath is made of low-smoke halogen-free flame retardant polyolefin sheath, for the function of the forward cable, the four pairs of wires are made of low-density polyethylene cross Core frame)
发表于 2022-8-5 17:11:12
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