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'2020'
China GB Standards List

 GB/T 39545.3-2020  
Design and selection of components for enclosed gear drives—Part 3: Shaft-to-hub juncture with keyless fits

闭式齿轮传动装置的零部件设计和选择 第3部分:轴和轮毂的无键配合连接
 GB/T 39530-2020  
Thermal spraying—Nanostructured zirconia powder and coating preparation

热喷涂 纳米氧化锆粉末及涂层制备工艺技术条件
 GB/T 39673.1-2020  
Home and building electronic systems (HBES) and building automation and control systems (BACS) — Part 1: General requirements

住宅和楼宇电子系统(HBES)及楼宇自动化和控制系统(BACS) 第1部分:通用要求

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