GB 12940-1991 Technical specification for silver-graphite electrical contacts

GB/T 2828.1-2003 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.2-2008 Sampling procedures for inspection by attributes—Part 2:Sampling plans indexed by limiting quality(LQ)for isolated lot inspection GB/T 2828.3-2008 Sampling procedures for inspection by attributes—Part 3:Skip-lot sampling procedures GB/T 2828.4-2008 Sampling procedures for inspection by attributes—Part 4:Procedures for assessment of declared quality levels GB/T 2828.5-2011 Sampling procedures for inspection by attributes—Part 5:System of sequential sampling plans indexed by acceptance quality limit(AQL)for lot-by-lot inspection GB/T 2828.10-2010 Sampling procedures for inspection by attributes—Part 10:Introduction to the GB/T 2828 series of standards for sampling for inspection by attributes GB/T 2828.11-2008 Sampling procedures for inspection by attributes—Part 11:Procedures for assessment of declared quality levels for small population GB/T 5163-2006 Sintered metal materials, excluding hardmetals—Permeable sintered metal materials—Determination of density, oil content, and open porosity GB/T 5586-1998 Test methods for essential porperty of electric contact material GB/T 5586-2016 Test methods for essential property of electrical contact materials GB/T 5587-2003 Basic shapes,dimensions,symbols and notations of silver based electrical contacts GB/T 5587-2016 Basic shapes,dimensions,symbols and notations of silver based electrical contacts