Power operated systems for aerating turf on sports playing fields comprised of power operated blowers, supply lines, namely, flow lines connected to the power operated blowers, supply lines, namely, flow lines connected to the power operated blowers and to subterranean perforated pipes installed below the playing fields for creating a flow of air through the turf, flow control valves and couplings for controlling the flow of air

'aerat':5 'air':53,67 'blower':15,26,37 'compris':11 'connect':21,32 'control':58,63 'coupl':61 'creat':49 'field':10,47 'flow':19,30,51,57,65 'instal':43 'line':17,20,28,31 'name':18,29 'oper':2,14,25,36 'perfor':41 'pipe':42 'play':9,46 'power':1,13,24,35 'sport':8 'subterranean':40 'suppli':16,27 'system':3 'turf':6,56 'valv':59

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