IEC 61156-7:2023
数字通信用多芯对称对绞/四芯电缆.第7部分:传输特性达1200MHz的对称对绞电缆.数字和模拟通信电缆分规范
Multicore and symmetrical pair/quad cables for digital communications - Part 7: Symmetrical pair cables with transmission characteristics up to 1 200 MHz - Sectional specification for digital and anal