ZR-PTY22 19*1.0铁路信号电缆供应厂家PTYA23铁路信号电缆KVVP22,KVVP2控制电缆 屏蔽电缆KVVPKVVRPKVVP2KVVP22KVVRP22KVVP2-22 0.75,1.0,1.5,2.5 芯 2,3,4,5,7,10,12,14,16,24,27,30,37,41,44,48,52,61 产品标准:GB9330.1.2-90和参照国际电工委