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Electrical measuring instruments : grand prize Louisiana Purchase Exposition, St. Louis, 1904 (1904)
Leeds and Northrup Company · leaf 20
rO-^ T7^ … 0( ^m:A UmJ \wm 1WWM1 mm /5/OQO 400 300 200 /oo ^ mmtA mtm mmA mmmMn^Electricity · Electrical engineering · Electrical Equipment · Electrical Circuits · Electronics
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