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GB/T 15462-1995
电子设备用机电开关 第3-1部分:成列直插封装式开关 空白详细规范
Electromechanical switches for use in electronic equipments--Part 3-1:Blank detail specification for in-line package switches
GB/T 223.52-1987
Methods for chemical analysis of iron,steel and alloy--The hydroxylamine hydrochloride-iodometric method for the determination of selenium content
GB/T 223.51-1987
钢铁及合金化学分析方法 5-Br-PADAP 光度法测定锌量
Methods for chemical analysis of iron,steel and alloy--The 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol photometric method for the determination of zinc content
GB/T 15264-1994
Ambient air--Determination of lead--Flame atomic absorption spectrophotometric method
GB/T 223.22-1994
Methods for chemical analysis of iron,steel and alloy--The nitroso-R-salt spectrophotometric method for the determination of cobalt content