MHYBV-7-2-16七芯屏蔽拉力电缆 MHYBV-7-2-16布拖七芯屏蔽拉力电缆七芯屏蔽拉力电缆MHYBV-7-2-X10七芯屏蔽拉力电缆 MHYBV-7-1-X30 MHYBV-7-1 煤矿用聚乙烯绝缘镀锌钢丝编织铠装聚氯乙烯护套通信电缆 MHYBV-7-2SYV-75-5+RVVP-2*0.75+RVVP-2*1.0