Automatic fire prevention sprinkler systems comprising pipes, valves, circulating pumps, and switches sold or installed as a unit, and component parts thereof; unit comprised of a key switch, valve and an automatic alarm valve tester; devices comprised of valves [ and solenoids ] for testing water flow switches; electric test flow switches; automatic valves for use with automatic sprinkler systems; and electric flow switches

'alarm':33 'automat':1,32,51,56 'circul':9 'compon':20 'compris':6,24,37 'devic':36 'electr':47,60 'fire':2 'flow':45,49,61 'instal':15 'key':27 'part':21 'pipe':7 'prevent':3 'pump':10 'sold':13 'solenoid':41 'sprinkler':4,57 'switch':12,28,46,50,62 'system':5,58 'test':43,48 'tester':35 'thereof':22 'unit':18,23 'use':54 'valv':8,29,34,39,52 'water':44

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