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GB/T 4854.9-2016 standard english preview version PDF file download



GB Standard Code GB/T 4854.9-2016
Standard Category China National Standards
GB Standard English Title Acoustics—Reference zero for the calibration of audiometric equipment—Part 9: Preferred test conditions for the determination of reference hearing threshold levels
GB Standard Chinese Title 声学 校准测听设备的基准零级 第9部分:确定基准听阈级的优选测试条件
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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