The apparatus 1 further comprising an outlet filter immediately before {TAIL ~ the outlet} for purified air to remove {HEAD ~ a majority} of particles in the air stream of the apparatus 
The apparatus 1 further comprising an outlet filter immediately before { TAIL ~ the outlet } for purified air to remove { HEAD ~ a majority } of particles in the air stream of the apparatus
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH