GB/T 5443-1985 Standard PDF file download ; GB/T 5443-1985 Standard english preview version download

GB Standard Code	GB/T 5443-1985
Standard Category	China National Standards
GB Standard English Title	The test methods for the technical specifications of ringing and tone for automatic telephone switchingnetwork
GB Standard Chinese Title	电话自动交换网铃流和信号音技术指标测试方法
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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