The upper jaw is pivotally attached near its inner end on its backside to {HEAD ~ the end} of a dipper stick and a double action actuator or {TAIL ~ cylinder} for operative pivotal movement of the upper jaw relative to the dipper stick 
The upper jaw is pivotally attached near its inner end on its backside to { HEAD ~ the end } of a dipper stick and a double action actuator or { TAIL ~ cylinder } for operative pivotal movement of the upper jaw relative to the dipper stick
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH