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China GB Standards List

 GB/T 39545.4-2023  
Design and selection of components for enclosed gear drives - Part 4: balance classes for flexible couplings

闭式齿轮传动装置的零部件设计和选择 第4部分:挠性联轴器平衡等级
 GB/T 41104.3-2021  
Solder wire, solid and flux cored -- Specifications and test methods -- Part 3: Wetting balance test method for flux cored solder wire efficacy

实心和药芯软钎料丝? 规范和试验方法? 第3部分:药芯软钎料丝功效的润湿平衡试验方法

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