Oli THE PRODUCTION OF METALLIC BARS OF ANY SEC TION BY EXTRUSION AT HIGH TEMPERATURES. PRODUCING METALLIC BARS BY EXTRUSION. l 4 Acetylene in Vote. PRODUCING METALLIC BARS BY EXTRUSION., scientific american, 1896-06-20


Oli THE PRODUCTION OF METALLIC BARS OF ANY SEC TION BY EXTRUSION AT HIGH TEMPERATURES. PRODUCING METALLIC BARS BY EXTRUSION. l 4 Acetylene in Vote. PRODUCING METALLIC BARS BY EXTRUSION., scientific american, 1896-06-20


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