An assembly line... for tanks?

for these we must go to the assembly lines of the nation with the lessons of warfare in Europe plain to see a tremendous expansion of tank building capacity has taken place here in the Detroit tank Arsenal the world's first great tank Arsenal devoted entirely to the mass production of the tank we forged the armaments of Victory to wage A desperate War the immense resources of our industrial plant and the incomparable skill of the American worker have mobilized to meet a supreme test under this vast roof we create the rolling ports of armor steel the fighting tank with great Firepower fitting the American policy of aggressive mobile Warfare