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GB/T 5443-1985 standard english preview version PDF file 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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