PTY23铁路信号电缆是什么线 PTY2... MHYV|天津市电缆总厂第一分厂

p1Src=//y2.yzimgs.com/uploads/175499/2016225-19318506.jpg?watermark/2/text/TUhZVnzlpKnmtKXluILnlLXnvIbmgLvljoLnrKzkuIDliIbljoI=/font/5a6L5L2T/fontsize/500/fill/I0E3QTlBOA==/gravity/SouthEast"

aa