产品介绍：
    The self-supporting -like coaxial cable is mainly suitable in the village passes the cable TV network, its principal advantage is convenient for the long-distance range dispersion user wire laying, the line is neat, stable reliable. SYWV(Y)-75 self-supporting -like series electric cable structure size model SYWV (Y) - 75-5-7-9 in conductors straight after mm1.00+0.021.66+0.022.15+0.03 insulator outer diameter mm4.80+0.207.25+0.209.00+0.25 protective covering thickness mm0.800.951.05 electric cable outer diameter mm7.3+0.30 10.7+0.3012.8+0.3 reference weight kg/km5370100 self-supporting -like another linear diameter mm 1.01.62.0

技术特性及标准：
     SYWV(Y)-75型自承式系列电缆电气性能 型号SYWV（Y）-75 -5-7-9绝缘电阻MΩ.km 500V直流20℃≥5000500V直流20℃≥5000500V直流20℃≥5000缆芯介电强度KV 1.61.61.6护套介电强度KV火花3.05.0 8.0浸水2.03.05.0电容PF/m特性阻抗Ω 5275.0+3.05275.0+3.05275.0+3.0回波损耗(db)minVHF202020UHF 181818衰减常数db/100m50MHZ4.83.22.4200 MHZ9.76.45.0300 MHZ11.97.96.2450 MHZ14.59.77.6550 MHZ16.810.78.5750 MHZ19.712.910.1800 MHZ20.313.310.4860 MHZ21.013.810.81000 MHZ22.714.911.7