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