GB/T 3971.3-1983 Standard PDF file download ; GB/T 3971.3-1983 Standard english preview version download

GB Standard Code	GB/T 3971.3-1983
Standard Category	China National Standards
GB Standard English Title	The test methods for the technical specifications of multi-frequency register signalling for telephone auto-matic switching network
GB Standard Chinese Title	电话自动交换网多频记发器信号技术指标测试方法
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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