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GB 37478-2019
Minimum allowable values of energy efficiency and energy efficiency grades of LED luminaires for road and tunnel lighting
GB 19576-2019
Minimum allowable values of energy efficiency and energy efficiency grades for unitary air conditioners
GB/T 38912-2020
Test method for closed-end burst of zirconium tubes at room temperature
GB/T 20975.10-2020
Methods for chemical analysis of aluminium and aluminium alloys—Part 10:Determination of tin content
GB/T 27788-2020
Microbeam analysis—Scanning electron microscopy—Guidelines for calibrating image magnification
GB/T 20671.6-2020
非金属垫片材料分类体系及试验方法 第6部分:垫片材料与金属表面黏附性试验方法
Classification system and test methods for nonmetallic gasket materials—Part 6: Standard test method for adhesion of gasket materials to metal surfaces
GB/T 38908-2020
Test methods of chlorine resistance performance of household reverse osmosis and nanofiltration membrane elements
GB/T 2889.6-2020
Plain bearings—Terms, definitions, classification and symbols—Part 6:Abbreviated terms