A first conduit means is provided within the housing for receiving {HEAD ~ a first flow} of {TAIL ~ 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 
of
A first conduit means is provided within the housing for receiving { HEAD ~ a first flow } of { TAIL ~ 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
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH