Building and Engineering Catalog 1921 Edition . NO. 8 Gauges Showing thickness of gauge of sheet steel, Standardfrom which steel grilles are punched. CONTIIfUED ON KBIT PAGE ;gisters 133 TUTTLE & BAILEY MFG. CO. OF CANADA, LTD rUTTLE & BAlIJvV MFG. CO. OF CANADA, T • H. 56.

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