Kerosine (paraffin) unflued space heaters cooking and boiling applainces for domestic use.
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Specification for paraffin unflued space heating and cooking appliances for domestic use
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Specification for photographic grade sodium thiosulphate, crystalline
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Specification for photographic grade sodium thiosulphate, anhydrous
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Specification for photographic grade sodium sulphite, anhydrous
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Specification for photographic grade sodium hydroxide
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