The apparatus 10 wherein {HEAD ~ said tree engaging member} is actuated by {TAIL ~ a hydraulic cylinder assembly} mounted on said frame structure 
is actuated by
The apparatus 10 wherein { HEAD ~ said tree engaging member } is actuated by { TAIL ~ a hydraulic cylinder assembly } mounted on said frame structure
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH