矿用屏蔽通信电缆 MHYVP MHYVRP MHYAP 1*4*7/05.2 1*4*7/0.43 矿用屏蔽通信电缆 MHYVP MHYVRP MHYAP 1*4*7/05.2 1*4 MKVV|天津市电缆总厂第一分厂