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GB/T 15242.4-2021
液压缸活塞和活塞杆动密封装置尺寸系列 第4部分:支承环安装沟槽尺寸系列和公差
Dimensions series of rod and piston dynamic seals for hydraulic cylinders—Part 4:Dimensions and tolerances of bearing rings groove
GB/T 40131-2021
General specification for reduced-speed permanent-magnet stepping motors
GB/T 40274-2021
Tissue paper—Assessment and monitoring guidelines to quality safety condition of production process
GB/T 40096.1-2021
Technical specification for on-site protection equipment—Part 1: General specification
GB/T 40094.2-2021
Electronic commerce data transaction—Part 2: Data description specification
GB/T 40099-2021
Solar thermal electric plant—Creation of annual solar radiation data set
GB/T 40102-2021
Test code of connecting to power system for solar thermal power plants