Multi-element metallic cables used in analogue and digital communication and control -- Part 4-1: Sectional specification for screened cables characterised up to 600 MHz - Horizontal and building backbone cables
模拟和数字通信及控制用多元金属电缆第4-1部分:600MHz及以下屏蔽电缆分规范水平和建筑主干电缆