Powdered materials flow aiding devices for machinery and machine apparatus, namely, breakers to prevent granules from forming a bridge and a rat-hole in powder hoppers and dust-collector hoppers by vibration through the use of compressed air or spraying thereof for use in chemical processing machines and apparatus and food processing machines and apparatus

'aid':4 'air':40 'apparatus':10,51,57 'breaker':12 'bridg':19 'chemic':47 'collector':31 'compress':39 'devic':5 'dust':30 'dust-collector':29 'flow':3 'food':53 'form':17 'granul':15 'hole':24 'hopper':27,32 'machin':9,49,55 'machineri':7 'materi':2 'name':11 'powder':1,26 'prevent':14 'process':48,54 'rat':23 'rat-hol':22 'spray':42 'thereof':43 'use':37,45 'vibrat':34

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