an air flow passage through which {HEAD ~ grass cuttings} are discharged from {TAIL ~ said cutting chamber} in a current of air 
are discharged from
an air flow passage through which { HEAD ~ grass cuttings } are discharged from { TAIL ~ said cutting chamber } in a current of air
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH