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GB/T 11453-1989 standard english preview version PDF file download

GB Standard Code GB/T 11453-1989
Standard Category China National Standards
GB Standard English Title Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions
GB Standard Chinese Title 模拟实际工作条件下的助听器性能测量方法
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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