GB/T 20185-2006 Standard PDF file download ; GB/T 20185-2006 Standard english preview version download

GB Standard Code	GB/T 20185-2006
Standard Category	China National Standards
GB Standard English Title	Optical interface requirements for equipments and systems relating to the synchronous digital hierarchy
GB Standard Chinese Title	同步数字体系设备和系统的光接口技术要求
Chinese Version Price	$15 USD per 50 pages
English Translation Price	About $15 per 1 page; Inquire us for detail price

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