China National Standards

China Random incidence diffuse GB Standards List

  •  China "Random incidence diffuse" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 17312-1998 Random-incidence and diffuse-field calibration of sound level meters
    声级计的无规入射和扩散场校准    		 China National Standards
    Random incidence diffuse
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