Multicore and symmetrical pair/quad cables for digital communications to be used in harsh environments - Part 1: Generic specification (IEC 62012-1:2002); German version EN 62012-1:2002
恶劣环境下数字通信用多芯对称对绞/四芯电缆.第1部分:总规范(IEC 62012-1-2002);德文版EN 62012-1:2002