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ISO 5251:1981 Stainless steel butt-welding fittings
ISO 5498:1981 (R2014) Agricultural food products — Determination of crude fibre content — General method
ISO 5498:1981 (R2014) Agricultural food products — Determination of crude fibre content — General method
ISO 6000:1981 (R2014) Round-headed cabbage — Storage in the open
ISO 6000:1981 (R2014) Round-headed cabbage — Storage in the open
ISO 6384:1981 (R2019) Surface active agents — Technical ethoxylated fatty amines — Methods of analysis
ISO 6835:1981 (R2019) Surface active agents — Washing powders — Determination of total boron content — Titrimetric method
ISO 6384:1981 (R2019) Surface active agents — Technical ethoxylated fatty amines — Methods of analysis
ISO 6835:1981 (R2019) Surface active agents — Washing powders — Determination of total boron content — Titrimetric method
ISO 6629:1981 (R2016) Chromium ores and concentrates — Methods of chemical analysis — General instructions
ISO 6629:1981 (R2016) Chromium ores and concentrates — Methods of chemical analysis — General instructions
ISO 697:1981 (R2016) Surface active agents — Washing powders — Determination of apparent density — Method by measuring the mass of a given volume