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Amgueddfa Cymru – Museum Wales
Blueprint of flow diagram. Flow sheet for Kestner silica gel air drying plant, (Kestner Evaporator & Engineering Co. Ltd.) Dated 2-6-31 Drawing No. 10279 Attached to reverse is a slip of paper containing printed details of the Kestner Evaporator & Engineering Co. Ltd., and handwritten details in pencil which read '6 copies: Ferderated Iron & Steel Co. Ltd.' Date: '6-6-31'
