China National Standards

China instrument—Methods GB Standards List

  •  China "instrument—Methods" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 39849-2021 Non-destructive testing instruments—Ultrasonic time-of-flight diffraction instrument—Methods of performance tests
    无损检测仪器 超声衍射声时检测仪 性能测试方法    		 China National Standards
    instrument—Methods
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