The apparatus includes a housing supporting an eraser head and having a cavity in {HEAD ~ fluid communication} with {TAIL ~ a suction device} 
The apparatus includes a housing supporting an eraser head and having a cavity in { HEAD ~ fluid communication } with { TAIL ~ a suction device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL