ISO 756-1:1981 Propan-2-ol for industrial use -- Methods of test -- Part 1 : General standard by International Organization for Standardization, 12/01/1981
ISO 5220:1981 Air distribution and air diffusion -- Aerodynamic testing and rating of constant and variable dual or single duct boxes and single duct units standard by International Organization for Standardization, 12/01/1981
ISO 431:1981 [ Withdrawn ] Copper refinery shapes standard by International Organization for Standardization, 12/01/1981
ISO 3529-3:1981 Vacuum technology -- Vocabulary -- Part 3 : Vacuum gauges standard by International Organization for Standardization, 12/01/1981
ISO 3529-1:1981 Vacuum technology -- Vocabulary -- Part 1 : General terms standard by International Organization for Standardization, 12/01/1981
ISO 601:1981 Solid mineral fuels - Determination of arsenic content using the standard silver diethyldithiocarbamate photometric method of ISO 2590 standard by International Organization for Standardization, 12/01/1981
ISO 4194:1981 Magnesium alloys - Determination of zinc content - Flame atomic absorption spectrometric method standard by International Organization for Standardization, 12/01/1981
ISO 4193:1981 Aluminium and aluminium alloys - Determination of chromium content - Flame atomic absorption spectrometric method standard by International Organization for Standardization, 12/01/1981
ISO 4192:1981 Aluminium and aluminium alloys - Determination of lead content - Flame atomic absorption spectrometric method standard by International Organization for Standardization, 12/01/1981
ISO 320:1981 Manganese ores -- Determination of sulphur content -- Barium sulphate gravimetric methods and sulphur dioxide titrimetric method after combustion standard by International Organization for Standardization, 12/01/1981
ISO 2016:1981 Capillary solder fittings for copper tubes -- Assembly dimensions and tests standard by International Organization for Standardization, 12/01/1981
ISO 2551:1981 [ Withdrawn ] Machine-made textile floor coverings -- Determination of dimensional changes due to the effects of varied water and heat conditions standard by International Organization for Standardization, 12/01/1981