PTYA23鐵路信(xin)號電(dian)(dian)纜(lan)用以傳(chuan)輸(shu)電(dian)(dian)(磁)能,信(xin)息和實(shi)現電(dian)(dian)磁能轉換的線材產品(pin)。廣義的電(dian)(dian)線電(dian)(dian)纜(lan)亦簡稱為電(dian)(dian)纜(lan),狹(xia)義的電(dian)(dian)纜(lan)是指絕(jue)緣(yuan)電(dian)(dian)纜(lan),它(ta)可定(ding)義為:由下列(lie)部分組成的集合體;一根或多根絕(jue)緣(yuan)線芯,以及它(ta)們各自可能具有的包覆(fu)層(ceng),總保護(hu)(hu)層(ceng)及外護(hu)(hu)層(ceng),電(dian)(dian)纜(lan)亦可有附加的沒(mei)有絕(jue)緣(yuan)的導體。