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![Drill press operator, Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa. (LOC)](http://farm3.static.flickr.com/2375/2179219950_9147dfe9c5_m.jpg)
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![Annette del Sur public[iz]ing salvage campaign in yard of Douglas Aircraft Company, Long Beach, Calif. (LOC)](http://farm3.static.flickr.com/2270/2179924352_6894aec80c_m.jpg)
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![White-hot steel pours like water from a 35-ton electric furnace, Allegheny Ludlum Steel[e] Corp., Brackenridge, Pa. The finest quality steels and alloys are produced in these furnaces, which allow much greater control of temperature than other conversion](http://farm3.static.flickr.com/2385/2178430363_5bed2dfd1c_m.jpg)
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![Mounting motor [on a] Fairfax B-25 bomber, at North American Aviation, Inc., plant in [Inglewood], Calif. (LOC)](http://farm3.static.flickr.com/2178/2179068427_1958775ba5_m.jpg)
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![Making wiring assemblies at a junction box on the fire wall for the right engine of a B-25 bomber, North American Aviation, Inc., [Inglewood], Calif. Forward of this wall will be mounted one of the two 1,700-horsepower Wright Whirlwind engines which carry](http://farm3.static.flickr.com/2032/2179068787_0a2039cc3b_m.jpg)
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![North American B-25 bomber is prepared for painting on the outside assembly line, N[orth] A[merican] Aviation, Inc., Inglewood, Calif. (LOC)](http://farm3.static.flickr.com/2091/2179070407_c40bdf53ec_m.jpg)
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![In North American's modern machine shop, another aircraft part is finished on a huge turret lathe, N[orth] A[merican] Aviation, Inc., Inglewood, Calif. (LOC)](http://farm3.static.flickr.com/2246/2179072787_1da30156de_m.jpg)
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![On North American's outdoor assembly line, employees rush a B-25 to completion, N[orth] A[merican] Aviation, Inglewood, Calif. (LOC)](http://farm3.static.flickr.com/2014/2179071045_518c8abd9b_m.jpg)
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by The Library of Congress
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