rotary horizontal drum type dryers and coolers through which flowable solids and treatment gases are passed in heat exchange relation as used in the food, chemical, pharmaceutical, mining, construction and other industries engaged in handling such solids for use in industry

'chemic':26 'construct':29 'cooler':7 'drum':3 'dryer':5 'engag':33 'exchang':19 'flowabl':10 'food':25 'gase':14 'handl':35 'heat':18 'horizont':2 'industri':32,41 'mine':28 'pass':16 'pharmaceut':27 'relat':20 'rotari':1 'solid':11,37 'treatment':13 'type':4 'use':22,39

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