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ISO 6140:1991
Aluminium ores -- Preparation of samplesstandard by International Organization for Standardization, 11/01/1991
Specifies methods of treatment of gross samples and subsamples in order to preparate samples for the determination of moisture, chemical analysis and physical testing. Annex A forms an integral part of this standard. Annexes B, C, D, E and F are for information only.
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