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GB/T 6589-2002
半导体器件 分立器件 第3-2部分:信号（包括开关）和调整二极管 电压调整二极管和电压基准二极管（不包括温度补偿精密基准二极管） 空白详细规范
Semiconductordevices--Discrete devices--Part 3-2:Signal (including switching) and regulator diodes--Blank detail specification for voltage-regulator diodes and voltage-reference diodes (excluding temperature-compensated precision reference diodes)
GB/T 223.58-1987
Methods for chemical analysis of iron,steel and alloy--The extraction-absorption catalytic polarographic method for the determination of manganese content
GB/T 223.61-1988
Methods for chemical analysis of iron,steel and alloy--The ammonium phosphomolybdate volumetric method for the determination of phosphorus content
GB/T 9792-2003
Conversion coatings on metallic materials--Determination of coating mass per unit area--Gravimetric methods
GB/T 2469-1996
Pyrites and concentrate--Determination of carbon content--Caustic asbestos gravimetric method
GB/T 2923-1995
Determination of ISO speed of black-and-white pictorial still camera negative film/process systems