72294561
Apr 1, 1968
May 20, 1969
STRUCTURAL STEEL FABRICATIONS AND CONSTRUCTION PRODUCTS-NAMELY, FRAMING CHANNELS, JOISTS, ROOFING, FLOOR AND WALL PANELS, AND I-BEAMS, USED IN CONNECTION WITH FRAMING OF PRE-ENGINEERED STEEL BUILDINGS, INCLUDING ROOF AND WALL PANELS OF COLOR-COATED, ROLL-FORMED GALVANIZED STEEL
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