ISO 549:1981 Manganese ores -- Determination of combined water content -- Gravimetric method standard by International Organization for Standardization, 10/01/1981
ISO 5407:1981 As-sintered hardmetal pellets used in heading dies - Dimensions and tolerances standard by International Organization for Standardization, 10/01/1981
ISO 5892:1981 Rubber building gaskets - Materials for preformed solid vulcanized structural gaskets - Specification standard by International Organization for Standardization, 10/01/1981
ISO 589:1981 [ Withdrawn ] Hard coal; Determination of total moisture standard by International Organization for Standardization, 10/01/1981
ISO 6481:1981 Acceptance conditions for vertical surface type broaching machines - Testing of accuracy standard by International Organization for Standardization, 10/01/1981
ISO 811:1981 Textile fabrics -- Determination of resistance to water penetration -- Hydrostatic pressure test standard by International Organization for Standardization, 10/01/1981
ISO 6568:1981 [ Withdrawn ] Natural gas -- Simple analysis by gas chromatography standard by International Organization for Standardization, 09/01/1981
ISO 3923-2:1981 Metallic powders - Determination of apparent density - Part 2 : Scott volumeter method standard by International Organization for Standardization, 09/01/1981
ISO 7056:1981 Plastics laboratory ware - Beakers standard by International Organization for Standardization, 09/01/1981
ISO 3835-4:1981 Equipment for vine cultivation and wine making - Vocabulary - Part 4 standard by International Organization for Standardization, 09/01/1981
ISO 5522:1981 Fruits, vegetables and derived products -- Determination of total sulphur dioxide content standard by International Organization for Standardization, 09/01/1981
ISO 5193:1981 [ Withdrawn ] Wrought aluminium and aluminium alloys - Drawn round bars - Tolerances on shape and dimensions (Symmetric plus and minus tolerances on diameter) standard by International Organization for Standardization, 09/01/1981