{HEAD ~ The attachment} comprises {TAIL ~ a wheel guided, suction assembly} in which the slurry is contained in a shroud 
comprises
{ HEAD ~ The attachment } comprises { TAIL ~ a wheel guided , suction assembly } in which the slurry is contained in a shroud
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH