{HEAD ~ A first conduit means} is provided within the housing for receiving {TAIL ~ a first flow} of fluid from the plenum chamber and for directing the first fluid flow out of the housing for impingement upon the material to pick up and remove dust and cuttings from the vicinity of the cutting cone 
{ HEAD ~ A first conduit means } is provided within the housing for receiving { TAIL ~ a first flow } of fluid from the plenum chamber and for directing the first fluid flow out of the housing for impingement upon the material to pick up and remove dust and cuttings from the vicinity of the cutting cone
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