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ISO 789-8:1991 (R2017) Agricultural tractors — Test procedures — Part 8: Engine air cleaner
ISO 7911:1991 (R2019) Unshelled pine nuts — Specification
ISO 7911:1991 (R2019) Unshelled pine nuts — Specification
ISO 9685:1991 (R2014) Iron ores — Determination of nickel and/or chromium contents — Flame atomic absorption spectrometric method
ISO 9685:1991 (R2014) Iron ores — Determination of nickel and/or chromium contents — Flame atomic absorption spectrometric method
ISO 8841:1991 (R2017) Dense, shaped refractory products — Determination of permeability to gases
ISO 8841:1991 (R2017) Dense, shaped refractory products — Determination of permeability to gases
ISO 7725:1991 (R2011) Rubber and rubber products — Determination of bromine and chlorine content — Oxygen flask combustion technique
ISO 6101-1:1991 (R2011) Rubber — Determination of metal content by atomic absorption spectrometry — Part 1: Determination of zinc content
ISO 6101-1:1991 (R2011) Rubber — Determination of metal content by atomic absorption spectrometry — Part 1: Determination of zinc content
ISO 2110 AMD 1 (1991-09) ISO 2110:1989/AMD1:1991 Amendment 1 - Information technology - Data communication - 25-pole DTE/DCE interface connector and contact number assignments
ISO 8361-1:1991 Thermoplastics pipes and fittings — Water absorption — Part 1: General test method