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ISO 344:1981 Textile machinery and accessories — Spinning machines — Flyer bobbins
ISO 5520:1981 Fruits, vegetables and derived products — Determination of alkalinity of total ash and of water-soluble ash
ISO 787-4:1981 General methods of test for pigments and extenders — Part 4: Determination of acidity or alkalinity of the aqueous extract
ISO 5521:1981 Fruits, vegetables and derived products — Qualitative method for the detection of sulphur dioxide
ISO 5523:1981 Liquid fruit and vegetable products — Determination of sulphur dioxide content (Routine method)
ISO 6882:1981 Asparagus — Guide to refrigerated transport
ISO 1237:1981 Mustard seed — Specification
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