WWW国产精品内射老熟女,欧美人妻第一页一区,欧美综合一区二区综合,色妺妺AⅤ爽爽一区二区

HYV市內(nèi)通信電纜-HYV市內(nèi)通信電纜HYV市內(nèi)通信電纜-HYV市內(nèi)通信電纜通信電纜型號HYA    HYAC    HYAT    HPVV    HYV    HJVV    HYY      
                配線電纜型號HPVV    ZR-HPVV      
                局用電纜型號HJVV    HJVVP    ZR-HJVV    ZR-HJVVP      
                鎧裝通信電纜型號HYA53    WDZ-HYA53    ZRC-HYA53      
                填充式鎧裝通信電纜型號HYAT53    WDZ-HYAT53    ZRC-HYAT53      
                其它鎧裝通信電纜型號HYA22    HYV22    HYAT22    HYY23    HYYT23    HYA23    HYAT23      
                鋼絲鎧裝通信電纜HYA33    HYAT33    WDZ-HYA53    HYY33    HYYT33    HYY33      
                充油通信電纜HYAT    ZRC-HYAT    WDZ-HYAT    HYYT      
                全塑市話電纜執(zhí)行標準：YD/T322-1996      
                全塑市話電纜結(jié)構(gòu)特點：    HYA型市內(nèi)通信電纜采用全色譜高密度聚乙稀絕緣，鋁塑綜合護套(即電纜的縱包屏蔽鋁帶與護套粘結(jié)成一體，形成密封護層)，具有電氣性能優(yōu)越，施工方便的特點。      
                全塑市話電纜主要電氣性能：      
                1.    直流電阻:20℃    0.4    ≤148?/km    0.5    ≤95.0?/km    0.6    ≤65.8?/km    0.8    ≤36.6    ?/km      
                2.    絕緣電氣強度：導(dǎo)體之間1min    1kv不擊穿    導(dǎo)體與屏蔽1min    3kv不擊穿      
                3.    絕緣電阻：每根芯線與其余線芯接地充氣電纜大于10000MΩ.km填充式電纜大于3000MΩ.km。      
                4.    工作電容：平均值    52±2nF/km