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