Standards GB - Chinese national standards - Page 5258

Double end studs--bm=1d

Standard published on 6.2.1988

Air quality--Determination of benzo(a) pyrene in flying bust--Acetylated paper chromatography fluorescence spectrophotometric method

Standard published on 30.3.1988

Generic specification for film integrated circuits and hybrid film integrated circuits

Standard published on 9.7.1996

Integrated wastewater discharge standard

Standard published on 4.10.1996

Pure nitrogen,high purity nitrogen and ultra pure nitrogen

Standard published on 29.8.2025

Double end studs--bm=1.25d

Standard published on 6.2.1988

Oxygen supplies for medicine and aircraft breathing

Standard published on 31.10.2025

Gas analysis—Determination of the contents of trace carbon monoxide, carbon dioxide and hydrocarbon in gases—Gas chromatography with flame ionization detector

Standard published on 29.8.2025

Micrographics - Test target for checking optical density of negative microimages in microfilming

Standard published on 16.7.2008

Double end studs--bm=1.5d

Standard published on 6.2.1988