China National Standards

China specfication Industry Standards English PDF List

  •  China "specfication" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    JJF 1147-2006 Calibration specfication for acoustic performance of anechoic rooms and hemi-anechoic rooms
    消声室和半消声室声学特性校准规范    		 China Metrological Standards
    specfication
    English PDF

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