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ac or dc alarm signals Asphalt Authorities having jurisdiction buttweld calcium chloride Calif Celotex Corp central station Chicago circuit Class Classification Corp cylinders discharge dry pipe valve Electric Elkhart eral Fire Extinguisher evidence of inspection exceeding factories by Underwriters fire alarm boxes Fire Door fire test fire walls Firecraft flanged Grinnell hardware Hollow-Metal hose incl indicate conditions Inspection Service installed Johns-Manville Label Service Labora Laboratories lb per sq manufacturer Marking mechanism metal Model designation name plate nozzle Ohio openings in vertical over-all width pattern pressure Products pull boxes pump R. I. Gen Rate of Foam Reexamination Service release Rockwood Roof Coverings serves as evidence Service of Underwriters Sheet-Metal signifies compliance sizes sprinkler equipment standard standpipe steel submitted for labeling supervisory tank temperature thermostats Tin-clad tion tories tubing Type designation unit unitóLabel upright or pendent vertical shafts warp threads waterflow York Youngstown