铁路信号电缆PTYL23  PTYLH23  详细 说明PTYA23-8芯塑料绝缘和聚护套铁路信号电缆 PTYAH PTYA PZYA PTYV PTYY PTY22 PTY23(PZY02 PZY03 PZY23 PZY22)1/0.8mm(1/1.0mm) 2-48芯 适用于额定电压交流500V或直流1000...