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  •  China "GB" Standards List:
    • Standard  Code Standard English Title Standard Class Order
    GB/T 13269-1991 Atmospheric air--Test dust standard sample--Fly ash

    China National - GB Standards
    GB/T 13268-1991 Atmospheric air--Test dust standard sample--Loess dust

    China National - GB Standards
    GB/T 13273-1991 Analytical method for 131I in plant and animal thyroid gland

    China National - GB Standards
    GB/T 13272-1991 Analytical method for 131I in water

    China National - GB Standards
    GB/T 13267-1991 Water quality--Determination of the acute toxicity of substance to a freshwater fish (Brachydanio rerio Hamilton-Buchanan)

    China National - GB Standards
    GB/T 13266-1991 Water quality--Determination of the acute toxicity of substance to Daphnia (Daphnia magna straus)

    China National - GB Standards
    GB/T 13247-1991 Ferroalloys--Sampling and testing methods for determination of grain size

    China National - GB Standards
    GB/T 13242-1991 Iron ores--Low-temperature disintegration test--Method using cold tumbling after static reduction

    China National - GB Standards
    GB/T 13241-1991 Iron ores--Determination of reducibility

    China National - GB Standards
    GB/T 13240-1991 Iron ore pellets--Determination of relative free swelling index

    China National - GB Standards
    GB/T 13238-1991 Copper-steel clad plates

    China National - GB Standards
    GB/T 13235.2-1991 Petroleum and liquid petroleum products--Volumetric calibration of vertical cylindrical metal tanks--Optical reference line method

    China National - GB Standards
    GB/T 13235.1-1991 Petroleum and liquid petroleum products--Volumetric calibration of vertical cylindrical metal tanks--Strapping method

    China National - GB Standards
    GB/T 13231-1991 Calculated methods of carrying capacity for receiving and dispatching tracks at railway marshalling station(3-stage/3-yard)

    China National - GB Standards
    GB/T 13230-1991 Plain detonators

    China National - GB Standards
    GB/T 13227-1991 Water-dipping test of industrial detonator

    China National - GB Standards
    GB/T 13226-1991 Lead plate test for industrial detonator

    China National - GB Standards
    GB/T 13225-1991 Determination of delay time of industrial detonator

    China National - GB Standards
    GB/T 13224-1991 Test methods for industrial detonating cord

    China National - GB Standards
    GB/T 13220-1991 Determination of particle size distribution of fine powder--Method of sieve classfication with sonic wave

    China National - GB Standards
    GB/T 13186-1991 General specification for airborne doppler navigation systems

    China National - GB Standards
    GB/T 12993-1991 Thermal performances evaluation for electronic equipment

    China National - GB Standards
    GB/T 13158-1991 Compatibility test procedures of clock and synchronization equipment of digital switch introducedinto digital network

    China National - GB Standards
    GB/T 13157-1991 Overall electro-acoustic frequency response for reproduction of 35mm optical sound track--Reproduction characteristics

    China National - GB Standards
    GB/T 13212-1991 Canned water chestnuts

    China National - GB Standards
    GB/T 223.16-1991 Methods for chemical analysis of iron£¬steel and alloy--The chromotropic acid photometric method for the determination of titanium content

    China National - GB Standards
    GB/T 223.12-1991 Methodsfor chemical analysis of iron£¬steel and alloy--The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content

    China National - GB Standards
    GB/T 13169-1991 General specification for 4MHz (960ch) carrier systems on standardized 1.2/4.4 mm coaxial cable pairs

    China National - GB Standards
    GB/T 13168-1991 General specification for 8MHz (1800ch) carrier systems on standardized 2.6/9.5mm coaxialcable pairs

    China National - GB Standards
    GB/T 13167-1991 Requirements for long haul optical fiber cable systems joined to national public telecommunication network

    China National - GB Standards

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