The invention eliminates {HEAD ~ substantially all} of {TAIL ~ the machining} and totally eliminates that part of the machining requiring a high degree of accuracy and alignment 
of
The invention eliminates { HEAD ~ substantially all } of { TAIL ~ the machining } and totally eliminates that part of the machining requiring a high degree of accuracy and alignment
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH