SYV75-17视频线现货
2025-01-06
、全塑市内通信电缆的缆芯由芯线、扎带及包带层组成。为了减少回路间的串音，芯线间需要扭绞，芯线扭绞有对绞和星绞两种，其中对绞式使用量。2、全塑电缆的色谱有普通色谱和全色谱
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