(Description: ■ Executive Standard: GY/T135-1998 ■ SYWV--Physical foamed polyethylene insulation, aluminum-plastic composite film and tinned round copper wire or aluminum-magnesium alloy wire weaving, PVC sheath. ■SYWY--physical foamed polyethylene insulation, aluminum-plastic composite film and tinned round copper wire or aluminum-magnesium alloy wire braided, polyethylene sheath. ■SYWLY-75-9 type and SYWLY-75-12 type are physical foamed polyethylene insulation, aluminum tube outer conductor and polyethylene sheath. ■75-5A, 75-7A, 75-9A, 75-12A outer conductor structure is four-layer shielding mode. ■The inner conductor of 75-5 and 75-7 is made of pure copper or copper-clad steel; the inner conductor of 75-9 and 75-12 is made of pure copper or copper-clad aluminum.)
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