China National Standards

China supra GB Standards Search


GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards;  We provide Chinese GB standards and English version GB standards  Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services.
  •  China "supra" GB Standards List:
  • GB/T 25498.3-2010- English Version of China National Standard
    Electroacoustics - Simulators of human head and ear - Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry
    电声学 人头模拟器和耳模拟器 第3部分:校准压耳式测听耳机用声耦合器
    GB/T 25498.1-2010- English Version of China National Standard
    Electroacoustics - Simulators of human head and ear - Part 1: Ear simulator for the calibration of supra-aural earphones
    电声学 人头模拟器和耳模拟器 第1部分:校准压耳式耳机用耳模拟器
    GB/T 4854.1-2004- English Version of China National Standard
    Acoustics--Reference zero for the calibration of audiometric equipment--Part1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
    声学 校准测听设备的基准零级 第1部分:压耳式耳机纯音基准等效阈声压级

    Find out:3Items   |  To Page of: First -Previous-Next -Last  | 1

     

    +86-400-6578191        info@transcustoms.com 
    106# Zhongmao Mansion,No.1 Beizhan Road,Shenzhen,China
    ©  RJS Copyright  2001-2018 All Rights Reserved

    - Since 2001 -
    Focus on China Standards & Compliance Services

    www.rjs.cn

    China Licenses

    www.transcustoms.com

    China HS code & Tariff

    www.gbstandards.org

    China National Standards