File:GENERAL VIEW OF OPEN HEARTH AND BESSEMER BUILDING FROM HOT METAL BRIDGE, LOOKING SW. - Jones and Laughlin Steel Corporation, Pittsburgh Works, Morgan Billet Mill Engine, 550 HAER PA,2-PITBU,62A-31.tif
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![File:GENERAL VIEW OF OPEN HEARTH AND BESSEMER BUILDING FROM HOT METAL BRIDGE, LOOKING SW. - Jones and Laughlin Steel Corporation, Pittsburgh Works, Morgan Billet Mill Engine, 550 HAER PA,2-PITBU,62A-31.tif](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/GENERAL_VIEW_OF_OPEN_HEARTH_AND_BESSEMER_BUILDING_FROM_HOT_METAL_BRIDGE%2C_LOOKING_SW._-_Jones_and_Laughlin_Steel_Corporation%2C_Pittsburgh_Works%2C_Morgan_Billet_Mill_Engine%2C_550_HAER_PA%2C2-PITBU%2C62A-31.tif/lossy-page1-800px-thumbnail.tif.jpg?20140802132109)
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