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PDF Standards BS 4432-2:1969

Methods for the determining optical properties of pulp paper and board. Measurement of diffuse ISO brightness (blue reflectance factor) of paper and board
standard by BSI Group, 03/18/1969

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BS

PDF Standards BS 4272-2:1968

Anaesthetic and analgesic machines-Analgesic machines of the on-demand type supplied with pre-mixed nitrous oxide-oxygen from a single container
standard by BSI Group, 01/15/1968

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