The portion of this lock range in which {TAIL ~ the width} of {HEAD ~ the lock range} decreases is positively utilized 
The portion of this lock range in which { TAIL ~ the width } of { HEAD ~ the lock range } decreases is positively utilized
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH