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GB/T 223.41-1985
钢铁及合金化学分析方法 离子交换分离-连苯三酚光度法测定钽量
Methods for chemical analysis of iron,steel and alloy--The anion-exchange separation-pyrogallol photometric method for the determination of tantalum content
GB/T 3098.10-1993
Mechanical properties of fasteners--Bolts,screws,studs and nuts made of non-ferrous metals
GB/T 223.68-1997
钢铁及合金化学分析方法 管式炉内燃烧后碘酸钾滴定法测定硫含量
Methods for chemical analysis of iron,steel and alloy--The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
GB 5135.2-2003
Automatic sprinkler system--Part 2:Wet system alarm valves,retard chamber,water motor alarm





