The lower jaw is attached near {TAIL ~ its inner end} on its backside to the dipper stick by a linkage for operative pivotal movement of the upper jaw relative to {HEAD ~ the lower jaw} 
The lower jaw is attached near { TAIL ~ its inner end } on its backside to the dipper stick by a linkage for operative pivotal movement of the upper jaw relative to { HEAD ~ the lower jaw }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD