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Author: Underwriters Laboratories, Incorporated
Title: Outline of Investigation for Thermoplastic Sprinkler Pipe and Fittings for Fire Protection Service. Issue Number 4.
Coporate: Underwriters Laboratories, Inc., Northbrook, IL
Report: UL Subject 1821, June 1991, 30 p.
Keywords: thermoplastics | sprinklers | pipes | fire protection | sprinkler systems | standards