a collector connected to {HEAD ~ said passage} for accumulating {TAIL ~ said grass cuttings}; and 
for accumulating
a collector connected to { HEAD ~ said passage } for accumulating { TAIL ~ said grass cuttings } ; and
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH