China National Standards

China Inorganic sapphire watch GB Standards List

  •  China "Inorganic sapphire watch" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 39141.3-2022 Inorganic and sapphire watch glasses - Part 3: Qualitative standards and test methods {译}
    无机和蓝宝石手表玻璃 第3部分：定性标准和试验方法    		 China National Standards
    Inorganic sapphire watch
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