73766533
Nov 30, 1988
Feb 20, 1990
DELUGE AND PREACTION FIRE PROTECTION SYSTEMS COMPRISING AUTOMATIC FIRE DETECTORS, NOZZLES OR SPRINKLERS, AUTOMATIC CONTROL VALVES, AND PARTS THEREOF, FOR USE IN FIRES WHICH REQUIRE AN IMMEDIATE APPLICATION OF WATER OVER A POTENTIAL FIRE AREA
Electrical and Scientific Apparatus