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請說明標準明稱

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

BS EN
50288-4-1:2003

http://jqgyxcq.com.cn/loadoo.asp?Rname=zhaogy2006&IID=55184

Multi-element metallic
cables used in analogue
and digital
communication and
control —
Part 4-2: Sectional specification for
screened cables characterised up to
600 MHz — Work area and patch cord
cables
BS EN
50288-4-2:2003

http://jqgyxcq.com.cn/loadoo.asp?Rname=zhaogy2006&IID=55185