ISO 4854:1981 Personal eye-protectors - Optical test methods standard by International Organization for Standardization, 05/01/1981
ISO 4543:1981 Metallic and other non-organic coatings - General rules for corrosion tests applicable for storage conditions standard by International Organization for Standardization, 05/01/1981
ISO 301:1981 Zinc alloy ingots intended for casting standard by International Organization for Standardization, 05/01/1981
ISO 6129:1981 Chromium ores -- Determination of hygroscopic moisture content in analytical samples -- Gravimetric method standard by International Organization for Standardization, 05/01/1981
ISO 5314:1981 Fertilizers - Determination of ammoniacal nitrogen content - Titrimetric method after distillation standard by International Organization for Standardization, 05/01/1981
ISO 4156:1981 Straight cylindrical involute splines; Metric module, side fit; Generalities, dimensions and inspection standard by International Organization for Standardization, 05/01/1981
ISO 5890:1981 Manganese ores and concentrates -- Determination of silicon content -- Gravimetric method standard by International Organization for Standardization, 05/01/1981
ISO 5940:1981 Carbonaceous materials for the production of aluminium -- Pitch for electrodes -- Determination of softening point by the ring-and-ball method standard by International Organization for Standardization, 05/01/1981
ISO 4310:1981 Cranes - Test code and procedures standard by International Organization for Standardization, 05/01/1981
ISO 4143:1981 Shipbuilding -- Inland vessels -- Open rowing lifeboats standard by International Organization for Standardization, 05/01/1981
ISO 4707:1981 [ Withdrawn ] Cork -- Stoppers -- Sampling for inspection of dimensional characteristics standard by International Organization for Standardization, 05/01/1981
ISO 6989:1981 Textile fibres -- Determination of length and length distribution of staple fibres (by measurement of single fibres) standard by International Organization for Standardization, 05/01/1981