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Photography. Photographic-grade chemicals. Test methods - Determination of sulfide content LONG_TITLE Normative reference to ISO 603

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Normative reference to ISO 603 changed to be informative

Note 1: Annex A (informative) has been organized so that each clause and subclause number therein addresses the corresponding clause and subclause number in IEC 61511-1:2016 except for being preceded by “A”

ISO 23599 assists in the smooth installation of TWSI at a place where blind or vision-impaired persons can identify them without interference from an irregular walking surface

the particle diameter can be calculated on the assumption that the particles are spherical in shape

Photography. Photographic-grade chemicals. Test methods - Determination of sulfide content LONG_TITLE Normative reference to ISO 603

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