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ISO 4156:1981Straight cylindrical involute splines; Metric module, side fit; Generalities, dimensions and inspectionstandard by International Organization for Standardization, 05/01/1981
ISO 5314:1981Fertilizers - Determination of ammoniacal nitrogen content - Titrimetric method after distillationstandard by International Organization for Standardization, 05/01/1981
ISO 5890:1981Manganese ores and concentrates -- Determination of silicon content -- Gravimetric methodstandard by International Organization for Standardization, 05/01/1981
ISO 4797:1981 [ Withdrawn ]Laboratory glassware; Flasks with conical ground jointsstandard by International Organization for Standardization, 05/01/1981
ISO 4920:1981Textiles -- Determination of resistance to surface wetting (spray test) of fabricsstandard by International Organization for Standardization, 05/01/1981
ISO 4302:1981Cranes - Wind load assessmentstandard by International Organization for Standardization, 05/01/1981
ISO 4855:1981 [ Withdrawn ]Personal eye-protectors - Non-optical test methodsstandard by International Organization for Standardization, 04/01/1981
ISO 5251:1981Stainless steel butt-welding fittingsstandard by International Organization for Standardization, 04/01/1981
ISO 65:1981Carbon steel tubes suitable for screwing in accordance with ISO 7-1standard by International Organization for Standardization, 04/01/1981
ISO 6835:1981Surface active agents -- Washing powders -- Determination of total boron content -- Titrimetric methodstandard by International Organization for Standardization, 04/01/1981
ISO 5498:1981Agricultural food products -- Determination of crude fibre content -- General methodstandard by International Organization for Standardization, 04/01/1981
ISO 5903:1981 [ Withdrawn ]Gymnastic equipment -- Landing mats and surfaces for floor exercises -- Determination of hardness and impact dampingstandard by International Organization for Standardization, 04/01/1981