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ISO 9910:1991 (R2017) Oil of sweet orange — Determination of the total carotenoids content
ISO 9931:1991 (R2018) Coal — Sampling of pulverized coal conveyed by gases in direct fired coal systems
ISO 9931:1991 (R2018) Coal — Sampling of pulverized coal conveyed by gases in direct fired coal systems
ISO 6934-3:1991 (R2014) Steel for the prestressing of concrete — Part 3: Quenched and tempered wire
ISO 6934-3:1991 (R2014) Steel for the prestressing of concrete — Part 3: Quenched and tempered wire
ISO 6934-5:1991 (R2014) Steel for the prestressing of concrete — Part 5: Hot-rolled steel bars with or without subsequent processing
ISO 6934-4:1991 (R2013) Steel for the prestressing of concrete — Part 4: Strand
ISO 6934-5:1991 (R2014) Steel for the prestressing of concrete — Part 5: Hot-rolled steel bars with or without subsequent processing
ISO 10053:1991 (R2014) Acoustics — Measurement of office screen sound attenuation under specific laboratory conditions
ISO 10070:1991 (R2015) Metallic powders — Determination of envelope-specific surface area from measurements of the permeability to air of a powder bed under steady-state flow conditions
ISO 10053:1991 (R2014) Acoustics — Measurement of office screen sound attenuation under specific laboratory conditions
ISO 7519:1991 (R2018) Technical drawings — Construction drawings — General principles of presentation for general arrangement and assembly drawings