METAL BINS, TANKS AND BUILDINGS FOR THE STORAGE OF BULK MATERIALS OTHER THAN STONE AND SAND; STATIONARY AND PORTABLE METAL TANKS FOR LIQUIDS; [ STOCK WATERING TROUGHS; ] FEED BINS, HOPPERS AND BUNKERS; SILOS; CORN CRIBS; AND GRAIN BINS AND TANKS HAVING FORCED AIR CIRCULATION WITH OR WITHOUT SUPPLEMENTAL HEATING

'air':42 'bin':2,28,37 'build':5 'bulk':10 'bunker':31 'circul':43 'corn':33 'crib':34 'feed':27 'forc':41 'grain':36 'heat':48 'hopper':29 'liquid':23 'materi':11 'metal':1,20 'portabl':19 'sand':16 'silo':32 'stationari':17 'stock':24 'stone':14 'storag':8 'supplement':47 'tank':3,21,39 'trough':26 'water':25 'without':46

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