China National Standards

China materials—Hardness GB Standards List

  •  China "materials—Hardness" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 34205-2017 Metallic materials—Hardness testing—Ultrasonic contact impedance method
    金属材料 硬度试验 超声接触阻抗法    		 China National Standards
    materials—Hardness
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