Lightweight portable Centrifugal gravity separator concentrators intended for individual use for the recovery of stream bed deposits of fine placer gold and other precious minerals and metals; none of the foregoing being related to commercial solids separation equipment, material dryers, or parts therefor

'bed':16 'centrifug':3 'commerci':35 'concentr':6 'deposit':17 'dryer':40 'equip':38 'fine':19 'forego':31 'gold':21 'graviti':4 'individu':9 'intend':7 'lightweight':1 'materi':39 'metal':27 'miner':25 'none':28 'part':42 'placer':20 'portabl':2 'precious':24 'recoveri':13 'relat':33 'separ':5,37 'solid':36 'stream':15 'therefor':43 'use':10

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