GB/T 9397-2013 General specification for electrodynamic loudspeaker of direct radiator type

GB/T 9397-1996 General specification for electrodynamic loudspeaker of direct radiator type

GB/T 2423.28-2005 Environmental testing for electric and electronic products—Part 2:Test methods—Test T:Soldering 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 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability) GB/T 12060.5-2011 Sound system equipment—Part 5:Methods of measurement for main characteristics of loudspeakers SJ 42-1977 SJ 144-1982 SJ 1276-1977 SJ 1282-1977 SJ 1277-1977 Quality inspection rules for the acceptance of metallic coatings and chemically treated layers SJ 1278-1977 Inspection methods appearance of metallic coatings and chemically treated layers SJ 1279-1977 Test methods for metallic coatings SJ 1280-1977 Test methods for porosity of metallic coatings SJ 1283-1977 Test methods for corrosion of metallic coatings and chemically treated layers SJ 1284-1977 Methods for evaluation of corrosion test results for metallic coatings and chemically treated layers SJ 1285-1977 Test methods for electric insulating property of aluminium alloy anodizing SJ 1281-1977 Test methods for thickness of metallic coatings and chemically treated layers