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- 2019-05-24 ISO/TS 19807-2 "Nanotechnologies -- Magnetic nanomaterials -- Part 2: Specification of characteristics and measurements for nanostructured superparamagnetic beads for nucleic acid extraction"
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GB/T 20975.20-2020
铝及铝合金化学分析方法 第20部分:镓含量的测定 丁基罗丹明B分光光度法
Methods for chemical analysis of aluminium and aluminium alloys—Part 20:Determination of gallium content—Butyrhodamine B spectrophotometric method
GB/T 32065.19-2020
Environmental test methods for oceanographic instruments—Part 19 : Immersion test
GB/T 39330-2020
Technical specification for surface treatment of titanium alloy castings
GB/T 39342-2020
Aerospace electronic products—General specification for printed circuit board
GB/T 25217.14-2020
冲击地压测定、监测与防治方法 第14部分:顶板水压致裂防治方法
Methods for test, monitoring and prevention of rock burst—Part 14: Prevention method of roof hydraulic fracturing
GB/T 39341-2020
General specification for high speed transmission connectors for aerospace
GB/T 39328-2020
Additive manufacturing—Specification for material extrusion process of plastic materials