1.IEC60502;TB/T 2476-93 railway signal cable 2.ISO9001:2008 railway cale 3.China Railway,metros cable Signal cableThe specification is expressed by the number of cores,i.e 4,6,8,9,12,,14,16,19,21,,24,28,30,33,37,42,44,48,52,56,61.Operational characteristics The product is suitable for transmitting railway signal, audio-frequency and for controlling cicuits of the automatic signal devices with ...