The range of movement of {HEAD ~ the rod} 52 is determined by {TAIL ~ the setting} of a collar 68 toward the upper end of the rod and below the eyeblot 54 
The range of movement of { HEAD ~ the rod } 52 is determined by { TAIL ~ the setting } of a collar 68 toward the upper end of the rod and below the eyeblot 54
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH