Starting from:

$10

Chinese Standard: GB/T 3240-1982

Preferred frequencies for the acoustical measurement

NEQ  ISO 266-75

This standard is the original Chinese electronic standard.
After you successfully purchase, we will send the electronic version of this standard to your email address.
If you need translation, please contact email: ChineseStandardsLibraryS001@gmail.com. 

 

More products