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GB/T 21231-2007 standard english preview version PDF file download



GB Standard Code GB/T 21231-2007
Standard Category China National Standards
GB Standard English Title Acoustics - Method for the measurement of airborne noise emitted by small air-moving devices
GB Standard Chinese Title 声学 小型通风装置辐射空气噪声的测量方法
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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