Technical supply co., Scranton. [from old catalog] · Scranton, Pa., Technical supply co · leaf 35
*TEC^ DUPLEX ELECTRIC BLUEPRINTINGMACHINE … Tec Duplex Electric Blueprinting Machine represents the nearest toperfection attained in continuous electric blueprinting machines. The Tec Duplex Electric Blueprinting Machine differs from all othersin the most important part of its mechanism and thereby gains 100 per cent.efficiency. 30 -%
Engineering instruments · Drawing instruments
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