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Underwriters Laboratories, Incorporated
view article (1.0)Ceiling Dampers for Use in Floor and Ceiling Constructions. Airstream Products Co., Inc., Philadelphia, Pennsylvania.Underwriters Laboratories, Inc., Northbrook, IL['File R6679-1', 'Assignment 70NK3562']File R6679-1; Assignment 70NK3562
May 7, 1971
29 p.